Where do these wires go? Pics - S4 NA. Wont start.
09-26-09, 04:41 PM
#1
Where do these wires go? Pics - S4 NA. Wont start.
Ok guys I did not feel like ressurecting my old thread.
I took my s4 motor out and painted the engine bay and swapped a different tranny to it cuz the other one was bad. On the way back into the car a couple of peices pictured broke off the motor and I replaced the from my spare motor blown rotor.
I have some left over wires near the fuel filter area and have no idea what they plug into and a few harnesses near the ECU and cannot find a damn place to plug them in.
The car will turn over and I pulled the line from the filter and put it in the ON position and I get fuel coming out of the line, a very good amount. It doesn't shoot out more than 6 inches but it does gush.
The car will run on starter fluid so I know I have good spark.
Pics are below
I took my s4 motor out and painted the engine bay and swapped a different tranny to it cuz the other one was bad. On the way back into the car a couple of peices pictured broke off the motor and I replaced the from my spare motor blown rotor.
I have some left over wires near the fuel filter area and have no idea what they plug into and a few harnesses near the ECU and cannot find a damn place to plug them in.
The car will turn over and I pulled the line from the filter and put it in the ON position and I get fuel coming out of the line, a very good amount. It doesn't shoot out more than 6 inches but it does gush.
The car will run on starter fluid so I know I have good spark.
Pics are below
09-26-09, 05:32 PM
#3
Sequentially broken
That connector on the firewall used to connect to a ground wire that ran to near where the tranny/engine meet. Probably would be advisable to run another ground in a similar location. That 'where does this nipple go' runs to the stock pressure sensor if you don't have it plugged in at the ACV, or can be capped off. If you've replaced the parts that broke off those should be OK enough to get the car running. Does it just crank forever and not even begin to catch? Have you broke out the FSM in the fuel control section and checked the values at the ECU (especially injectors!) to make sure it's getting everything right? A quick n dirty thing you could try is to hold the AFM door open by hand and see if it catches/starts at all, I usually give that a try before heading to the ECU just to make sure it's not vac leak related.
09-26-09, 06:09 PM
#5
Sequentially broken
I believe those are for the HVAC. In any event, I've got both of those flopping around on my floor right now (just went and looked), and my car starts/runs just fine. Though I have no heating/cooling/vents at all. Guess you're going to have to hit the ECU with a MM and check everything the hard way.
09-26-09, 06:17 PM
#6
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Fuel lines on backwards?
If not that, then you have to ask yourself if the fuel injectors are getting power. Simple. Pull the small plug off the ECu. Key to ON. Each of the fuel inejctor sockets on the PLUG should have batt voltage. Light green/red, light green/black, light green/white and just light green are the colors of the wires in the small plug attached to the ECU.
On a early 86-87 1/2 car, there is a solenoid resistor package bolted to the right fender and just below the afm/air filter area. Large round plug with five wires. Gotta be connected up. The 88 cars and on don't have this item. This item supplys power to the fuel injectors. The ECU in turn pulses a gnd to the other wire on the fuel injectors to make them pulse.
The jpgs you attached don't seem to have any thing to do with the problem.
What year car is this??????????? I missed that.
If not that, then you have to ask yourself if the fuel injectors are getting power. Simple. Pull the small plug off the ECu. Key to ON. Each of the fuel inejctor sockets on the PLUG should have batt voltage. Light green/red, light green/black, light green/white and just light green are the colors of the wires in the small plug attached to the ECU.
On a early 86-87 1/2 car, there is a solenoid resistor package bolted to the right fender and just below the afm/air filter area. Large round plug with five wires. Gotta be connected up. The 88 cars and on don't have this item. This item supplys power to the fuel injectors. The ECU in turn pulses a gnd to the other wire on the fuel injectors to make them pulse.
The jpgs you attached don't seem to have any thing to do with the problem.
What year car is this??????????? I missed that.
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09-26-09, 06:38 PM
#9
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So if the solenoid resistor is connected up...........then check the voltages like I mentioned.
Or pull the large round plug off the solenoid resistor. On the harness side of that plug, the middle wire should be hot if the key is ON. A black/yellow wire. If power is there, then go to the ECU like I mentioned before and check out those four light green wires.
To be sure there is fuel in the rails.....look at the secondary fuel rail. I believe at the fwd side of that rail there is a 17 or 19mm banjo bolt. Put the key to ON and jumper the yellow two socket fuel pump check connector. Then just loosen that banjo bolt. Fuel should spray out as you just barely loosen that banjo bolt on the end of the rail (can't remember if the non turbo has that bolt on the front or aft end of the secondary rail and too lazy to go look). One end or the other for sure.
ALSO..........when the key is ON and the yellow two socket check connector is jumpered, you should be able to HEAR fuel flow constantly thru the fuel rails.
Or pull the large round plug off the solenoid resistor. On the harness side of that plug, the middle wire should be hot if the key is ON. A black/yellow wire. If power is there, then go to the ECU like I mentioned before and check out those four light green wires.
To be sure there is fuel in the rails.....look at the secondary fuel rail. I believe at the fwd side of that rail there is a 17 or 19mm banjo bolt. Put the key to ON and jumper the yellow two socket fuel pump check connector. Then just loosen that banjo bolt. Fuel should spray out as you just barely loosen that banjo bolt on the end of the rail (can't remember if the non turbo has that bolt on the front or aft end of the secondary rail and too lazy to go look). One end or the other for sure.
ALSO..........when the key is ON and the yellow two socket check connector is jumpered, you should be able to HEAR fuel flow constantly thru the fuel rails.
09-26-09, 06:54 PM
#11
hailers i barely hear **** going thru the rails. On the s5 you can hear it loud and clear. On this car all I can hear is the click. How hard should the fuel shoot out of the line if i unplug it from the filter and turn it on? It came out like four inches and gushed but hardly what i would call high pressure.
09-26-09, 07:16 PM
#12
Runs! What in the ****? Goddamn fuel lines were backwards. I took a closer look at that diagram and realised that the lines were backwards. Do the s5 lines plug up the same way??? that car has been running for months with the lines backwards if so. Would explain why it doesnt like to start for **** when cold and drives weak as hell.
09-26-09, 07:17 PM
#13
Sequentially broken
Has this car ran before? I've had this problem before while helping someone install a TII block, he had purchased the car as a roller and we couldn't get it fired up for the life of us. We ended up taking out the fuel pump and discovered it was running a carb fuel pump! If you have the means, a fuel pressure gauge would come in handy or hell verify the voltage at the fuel pump and if you can pull it out and make sure it's right.
09-26-09, 07:24 PM
#15
Dude the s4 is fine now. Runs like it always did. I just put the fuel lines on it the same way my s5 was except for the s5 runs, but it is weak as hell and has a very hard time cold starting. Do the lines run to the motor just the same.
09-26-09, 07:40 PM
#18
well it turns out that the s4 and s5 fuel lines are oppsite of each other. The line from the filter goes to the one furthest front. The return is the one closest to the firewall. Got excited for a minute.
That motor ran perfect in the vert before i swapped it into the coupe. Fuel lines were backwards when i first did the install and I caught it and it still hasnt run right since.
It runs weak when it starts and hates starting when cold. Roll starting however fixes the starting issue. Weird.
That motor ran perfect in the vert before i swapped it into the coupe. Fuel lines were backwards when i first did the install and I caught it and it still hasnt run right since.
It runs weak when it starts and hates starting when cold. Roll starting however fixes the starting issue. Weird.
09-26-09, 07:41 PM
#19
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Keep the money and hugs and the thanks. Send young nubile girls. I'm into debauchery. No Viagra required. Just the girls/women.
Frankly, I had no idea series five were opposite. I don't own one nor have ever worked on a series five.
Frankly, I had no idea series five were opposite. I don't own one nor have ever worked on a series five.
09-26-09, 09:48 PM
#22
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Compresssion Check the S5.
Even before you do that,I would Check the plugs First thing,before you Start it at the beginning of "your day" to see if the plugs are wet from the car sitting overnight.that would indicate some crap going on with the injectors.
..btw...Cough. (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/removed-engine-clean-paint-engine-bay-wont-start-reinstall-864590/)
post #4..(if the lines do not go to the Primary rail,switch them).Sound familiar?
and ya,the s4 .and s5 lines to the engine are opposite...also the usdm and Jdm engines like to play the same trick.
Glad you got it going.
Even before you do that,I would Check the plugs First thing,before you Start it at the beginning of "your day" to see if the plugs are wet from the car sitting overnight.that would indicate some crap going on with the injectors.
..btw...Cough. (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/removed-engine-clean-paint-engine-bay-wont-start-reinstall-864590/)
post #4..(if the lines do not go to the Primary rail,switch them).Sound familiar?
and ya,the s4 .and s5 lines to the engine are opposite...also the usdm and Jdm engines like to play the same trick.
Glad you got it going.
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