installed my newly rebuilt engine - problem
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installed my newly rebuilt engine - problem
Last November I blew my engine. Details in this thread. https://www.rx7club.com/3rd-generation-specific-1993-2002-16/rough-idle-dies-running-hot-odd-smell-hard-starting-sound-byte-attached-480478/
I just got my engine back from Rob at Pineapple a few weeks ago and have been prepping everything for the install. All went fairly smoothly and 2 days ago I thought I would finally get to drive my 7 again. Well....... didnt exactly work out that way. There were a number of problems, most of which I resolved, but I am left with one more hurdle.
For the last couple of days, I have been scouring the forum for answers. Ive got a few ideas on things to check out, and I would appreciate any and all members throwing anything my way for things to check out, ideas, etc.
Overview of the problem:
- engine turns over but does not fire
- tonight I will do a spark and fuel test (I dont believe I am getting any spark and checking the plugs there was no sign of gasoline)
- got one error code #11 (long + short) - intake air thermosensor - open or short possible
- there are four wires on the harness on the drivers side that all have a female single spade type connector - black. I believe they go to the oil pressure, oil temp?, and starter. the 4th, Im not sure.
- switching the wires around, I find that 2 of them connected to the starter allows me to turn the engine over. The other 2 do nothing.
- the tachometer shows no activity on cranking.
- when i turn off the key the cooling fans come on and stay on.
thanks for the help and feedback, I will be taking regular breaks from the car this evening and checking the post for input.
chuck
I just got my engine back from Rob at Pineapple a few weeks ago and have been prepping everything for the install. All went fairly smoothly and 2 days ago I thought I would finally get to drive my 7 again. Well....... didnt exactly work out that way. There were a number of problems, most of which I resolved, but I am left with one more hurdle.
For the last couple of days, I have been scouring the forum for answers. Ive got a few ideas on things to check out, and I would appreciate any and all members throwing anything my way for things to check out, ideas, etc.
Overview of the problem:
- engine turns over but does not fire
- tonight I will do a spark and fuel test (I dont believe I am getting any spark and checking the plugs there was no sign of gasoline)
- got one error code #11 (long + short) - intake air thermosensor - open or short possible
- there are four wires on the harness on the drivers side that all have a female single spade type connector - black. I believe they go to the oil pressure, oil temp?, and starter. the 4th, Im not sure.
- switching the wires around, I find that 2 of them connected to the starter allows me to turn the engine over. The other 2 do nothing.
- the tachometer shows no activity on cranking.
- when i turn off the key the cooling fans come on and stay on.
thanks for the help and feedback, I will be taking regular breaks from the car this evening and checking the post for input.
chuck
Last edited by a3dcadman; 04-27-06 at 09:03 PM.
#2
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The connector for the starter should be obvious b/c it is the only one of the 4 that will reach down there, and is paired up with the metal 90 degree bracket that bolts on to the starter with a 10mm nut. Also, the 4th connector may possibly be for the knock sensor.
There is a white connector down near the ecu that you may have accidentally unplugged when removing the engine, (it does not have to be unplugged to pull the engine wiring harness) make sure that it is plugged in.
Hope some of this helps
There is a white connector down near the ecu that you may have accidentally unplugged when removing the engine, (it does not have to be unplugged to pull the engine wiring harness) make sure that it is plugged in.
Hope some of this helps
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Originally Posted by GoodfellaFD3S
The connector for the starter should be obvious b/c it is the only one of the 4 that will reach down there, and is paired up with the metal 90 degree bracket that bolts on to the starter with a 10mm nut. Also, the 4th connector may possibly be for the knock sensor.
There is a white connector down near the ecu that you may have accidentally unplugged when removing the engine, (it does not have to be unplugged to pull the engine wiring harness) make sure that it is plugged in.
Hope some of this helps
There is a white connector down near the ecu that you may have accidentally unplugged when removing the engine, (it does not have to be unplugged to pull the engine wiring harness) make sure that it is plugged in.
Hope some of this helps
The knock sensor is already connected as is the power wire for the starter with its black plastic spade connector. I put one of the black spade connectors on the oil pressure sending unit and the other spade connector that originates from the rats nest goes to the small sending unit next to the oil pressure sending unit.
The remaining black plastic spade connector is part of the harness that is in the back of the engine by the fire wall, has a long lead which is protected with the corrugated tubing and is part of the harness that connects to some of the tranny connectors. This is one that I dont have a home for at present.
Still not getting any activity from fuel and ignition systems. Ideas on checks for these systems. Im working thru the shop manual but nothing definitive yet.
Im going under the dash again to see if I missed something when reconnecting the wiring harness back into the ECU.
chuck
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Here are some more questions that have come to mind as I try to understand and resolve the problems Ive encountered - all feedback appreciated.
1. would the intake air thermosensor sending a code also trigger the cooling fans to come on?
2. to get the cooling fans to stop running, I had to disconnect all the relays. wondering if I got the relays connected wrong when I rebuilt the harnesses. if so, how do you determine which relay goes to which harness connector.
3. just thought of something. a while back I had removed the AWS. what kind of electrical connector is hooked to it. maybe that is the extra connection I have.
4. which device creates the tach signal.
5. the coils harness is connected. Im going to check where I connected the ground cable for that harness. I believe I cleaned paint off of all grounding points but that one harness I placed on the engine after the engine was put back in the car. do the coils rely on that ground being hooked directly to the coils mounting frame?
6. on the diagnostic connector I grounded the fuel pump connector to prime the new fuel pump but I didnt hear the pump running. if the fuel lines were reversed (inlet/return), would the pump run anyway.
7. I painted the crank angle sensor trigger ring. could this cause a problem?
8. if either the fuel or spark is not functioning, does the ecu shut the other function off automatically.
thanks for your input!
chuck
1. would the intake air thermosensor sending a code also trigger the cooling fans to come on?
2. to get the cooling fans to stop running, I had to disconnect all the relays. wondering if I got the relays connected wrong when I rebuilt the harnesses. if so, how do you determine which relay goes to which harness connector.
3. just thought of something. a while back I had removed the AWS. what kind of electrical connector is hooked to it. maybe that is the extra connection I have.
4. which device creates the tach signal.
5. the coils harness is connected. Im going to check where I connected the ground cable for that harness. I believe I cleaned paint off of all grounding points but that one harness I placed on the engine after the engine was put back in the car. do the coils rely on that ground being hooked directly to the coils mounting frame?
6. on the diagnostic connector I grounded the fuel pump connector to prime the new fuel pump but I didnt hear the pump running. if the fuel lines were reversed (inlet/return), would the pump run anyway.
7. I painted the crank angle sensor trigger ring. could this cause a problem?
8. if either the fuel or spark is not functioning, does the ecu shut the other function off automatically.
thanks for your input!
chuck
Last edited by a3dcadman; 04-28-06 at 05:45 PM.
#5
Mr. Links
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Originally Posted by a3dcadman
1. would the intake air thermosensor sending a code also trigger the cooling fans to come on?
Originally Posted by a3dcadman
2. to get the cooling fans to stop running, i had to disconnect all the
relays. wondering if i got the relays connected wrong when i rebuilt the harnesses. if so, how do you determine which relay goes to which harness connector.
relays. wondering if i got the relays connected wrong when i rebuilt the harnesses. if so, how do you determine which relay goes to which harness connector.
Originally Posted by a3dcadman
5. the coils harness is connected. Im going to check where I connected the ground cable for that harness. I believe I cleaned paint off of all grounding points but that one harness I placed on the engine after the engine was put back in the car. do the coils rely on that ground being hooked directly to the coils mounting frame?
Originally Posted by a3dcadman
6. on the diagnostic connector I grounded the fuel pump connector to prime the new fuel pump but I didnt hear the pump running. if the fuel lines were reversed (inlet/return), would the pump run anyway.
Originally Posted by a3dcadman
7. I painted the crank angle sensor trigger ring. could this cause a problem?
Originally Posted by a3dcadman
8. if either the fuel or spark is not functioning, does the ecu shut the other function off automatically.
#6
development
Originally Posted by a3dcadman
Here are some more questions that have come to mind as I try to understand and resolve the problems Ive encountered - all feedback appreciated.
1. would the intake air thermosensor sending a code also trigger the cooling fans to come on?
1. would the intake air thermosensor sending a code also trigger the cooling fans to come on?
2. to get the cooling fans to stop running, i had to disconnect all the
relays. wondering if i got the relays connected wrong when i rebuilt the harnesses. if so, how do you determine which relay goes to which harness connector.
relays. wondering if i got the relays connected wrong when i rebuilt the harnesses. if so, how do you determine which relay goes to which harness connector.
3. just thought of something. a while back I had removed the AWS. what kind of electrical connector is hooked to it. maybe that is the extra connection I have.
4. which device creates the tach signal.
5. the coils harness is connected. Im going to check where I connected the ground cable for that harness. I believe I cleaned paint off of all grounding points but that one harness I placed on the engine after the engine was put back in the car. do the coils rely on that ground being hooked directly to the coils mounting frame?
6. on the diagnostic connector I grounded the fuel pump connector to prime the new fuel pump but I didnt hear the pump running. if the fuel lines were reversed (inlet/return), would the pump run anyway.
7. I painted the crank angle sensor trigger ring. could this cause a
problem?
problem?
8. if either the fuel or spark is not functioning, does the ecu shut the
other function off automatically.
other function off automatically.
thanks for your input!
chuck
chuck
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#8
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Originally Posted by Mahjik
Have you checked your EGI relay? If that is having a problem, it will cause the fans to start running when you try to start the car as well as not allow the car to start.
My assumption is that since the car ran fine and all functions worked prior to blowing an apex seal, then all the functions should still be okay. The only difference is that the car has been up on blocks since last November, so all the components should still be okay.
Thanks Mahjik.
ps - Ive been following your thread - when engines break - great stuff - you must be getting pretty excited that your car is getting close to running again.
chuck
#9
Mr. Links
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Originally Posted by a3dcadman
Since I am at work and dont have the car or manuals here, can you tell me where I find that relay. What is EGI and what does the relay do?
My assumption is that since the car ran fine and all functions worked prior to blowing an apex seal, then all the functions should still be okay. The only difference is that the car has been up on blocks since last November, so all the components should still be okay.
Thanks Mahjik.
My assumption is that since the car ran fine and all functions worked prior to blowing an apex seal, then all the functions should still be okay. The only difference is that the car has been up on blocks since last November, so all the components should still be okay.
Thanks Mahjik.
Originally Posted by a3dcadman
ps - Ive been following your thread - when engines break - great stuff - you must be getting pretty excited that your car is getting close to running again.
chuck
chuck
#10
My fans work too when I turn the key to on.
All the other electric work fine.
When I solve my problem I will inform you.
Check for the fun sensors it is 3 if I remember well.
All the other electric work fine.
When I solve my problem I will inform you.
Check for the fun sensors it is 3 if I remember well.
#11
2/4 wheel cornering fiend
Originally Posted by a3dcadman
Since I am at work and dont have the car or manuals here, can you tell me where I find that relay. What is EGI and what does the relay do?
The EGI relay is located in the main fuse box on next to the driver's side shock tower. There are two "main relays", one is the EGI, the other is the "circuit opening relay". The EGI controls power to both the injectors and the solenoids, and works in conjunction with the COR to basically control power flow to all vital engine functions.
You should hear an audible loud clicking sound when you turn the key.
#12
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Originally Posted by Kento
EGI=electronic gasoline injection
The EGI relay is located in the main fuse box on next to the driver's side shock tower. There are two "main relays", one is the EGI, the other is the "circuit opening relay". The EGI controls power to both the injectors and the solenoids, and works in conjunction with the COR to basically control power flow to all vital engine functions.
You should hear an audible loud clicking sound when you turn the key.
The EGI relay is located in the main fuse box on next to the driver's side shock tower. There are two "main relays", one is the EGI, the other is the "circuit opening relay". The EGI controls power to both the injectors and the solenoids, and works in conjunction with the COR to basically control power flow to all vital engine functions.
You should hear an audible loud clicking sound when you turn the key.
chuck
#13
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Did the diagnostics on the EGI and tested the components with volt ohm meter and they checked okay. Had the key out of the ignition and hooked up the battery charger. Within a few minutes, the fans kicked on. hmmm. If I pull the starter solenoid wire, the fans stop. If I pull the fan control solenoid off the harness, the fans stop. If I reconnect the electrical, the fans start up again. Strange.
chuck
chuck
#15
2/4 wheel cornering fiend
Originally Posted by a3dcadman
Did the diagnostics on the EGI and tested the components with volt ohm meter and they checked okay. Had the key out of the ignition and hooked up the battery charger. Within a few minutes, the fans kicked on. hmmm. If I pull the starter solenoid wire, the fans stop. If I pull the fan control solenoid off the harness, the fans stop. If I reconnect the electrical, the fans start up again. Strange.
chuck
chuck
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Originally Posted by Kento
Sounds to me like you've got some connectors swapped (possibly caused by the "harness rebuilding" you did? what exactly did that entail?).
Did get the car started today. The problem was related to the new supra fuel pump I put in. Inside the tank are 2 connectors that plug in to the interconnecting piece in the cover. One connector is for the fuel level and the other is to power the pump. Both connectors are the same shape and size and I reversed these. Then the other problem was that I had switched the fuel inlet and return lines at the firewall going up to the engine, so I wasnt getting any fuel into the engine. Started right up once there was fuel.
Ive got an oil leak to deal with and need to make adjustments to the TPS.
kento and dubulup, thanks for your feedback.
chuck
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