Help diagnose
#1
Help diagnose
I searched and read a few threads .. and just as it seemed I found my answer everyone stopped responding in those threads lol.
About the car:
1000 miles on rebuild
Nonsequential
Anyway here are the symptoms:
-As soon as car hits 0 psi it runs like ****
-Idle sits at 1500 (might be the large streetport i have though)
-Backfires a good amount
-CEL is on, but is giving a ton of crazy codes which I know can't be right since what its saying is wrong has been fixed already.
- Runs super rich (only getting around 145-155 miles a tank)
I've tried the following:
1. Tightining all the couplers including y-pipe (although they were loose ... didn't seem to really do anything)
2. Reset ECU ... currently doing it now, but don't think its going to help much since I reset it right after coming out of the rebuild and still did the same thing (granted the CEL went off for about 20 miles but eh .. that doesn't mean **** on these cars lol).
Opinions? .... TPS, MAP, etc.
About the car:
1000 miles on rebuild
Nonsequential
Anyway here are the symptoms:
-As soon as car hits 0 psi it runs like ****
-Idle sits at 1500 (might be the large streetport i have though)
-Backfires a good amount
-CEL is on, but is giving a ton of crazy codes which I know can't be right since what its saying is wrong has been fixed already.
- Runs super rich (only getting around 145-155 miles a tank)
I've tried the following:
1. Tightining all the couplers including y-pipe (although they were loose ... didn't seem to really do anything)
2. Reset ECU ... currently doing it now, but don't think its going to help much since I reset it right after coming out of the rebuild and still did the same thing (granted the CEL went off for about 20 miles but eh .. that doesn't mean **** on these cars lol).
Opinions? .... TPS, MAP, etc.
#5
map sensor appears to be fine. will doublecheck again tomorrow or this weekend with a multimeter though.
and yes since the rebuild its been doing this. engine has good vacuum though (around 15) .. so im sure its fine.
we tried swapping ecus and it still did it .. so i dont know? I have the FSM printed out so ill trace all the grounds and see how they look.
and yes since the rebuild its been doing this. engine has good vacuum though (around 15) .. so im sure its fine.
we tried swapping ecus and it still did it .. so i dont know? I have the FSM printed out so ill trace all the grounds and see how they look.
#10
Note all emissions have been removed and uneeded sensors . So thats probably the reason fort mosst of the codes popping up.
25 Solenoid valve - pressure regulator control
26 metering oil pump stepper motor
28 Solenoid valve - EGR
31 solenoid valve - relief 1
32 Solenoid valve - switching
33 Solenoid valve - port air bypass
34 Solenoid valve -idle speed control (BAC)
38 Solenoid valve - accelerated warmup system and air supply valve
39 Solenoid valve - relief 2
45 Solenoid valve - charge control
46 Solenoid valve - charge relief control
25 Solenoid valve - pressure regulator control
26 metering oil pump stepper motor
28 Solenoid valve - EGR
31 solenoid valve - relief 1
32 Solenoid valve - switching
33 Solenoid valve - port air bypass
34 Solenoid valve -idle speed control (BAC)
38 Solenoid valve - accelerated warmup system and air supply valve
39 Solenoid valve - relief 2
45 Solenoid valve - charge control
46 Solenoid valve - charge relief control
#13
i didnt do the nonsequential mod ... the shop that had it did. Is there a writeup for throwing on the 330 resistors?
I think that is going to be a rather large problem. It explains all 40 codes that are coming uip . As for 26 ... hmmmm what would cause that, or how would I test it (is there a page on the FSM for it?).
I think that is going to be a rather large problem. It explains all 40 codes that are coming uip . As for 26 ... hmmmm what would cause that, or how would I test it (is there a page on the FSM for it?).
#17
Mr. Links
iTrader: (1)
For the female solenoid connector sockets you just put one end of the resistor in one side, the other end of the resistor in the other side to make a bridge. The resistors I had were a little long so I just cut them down to fit better. Then just wrap the connector with the resistor in place with some tape.
#18
Mr. Links
iTrader: (1)
BTW, in case you do need to replace it:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/changing-oil-metering-pump-omp-while-car-my-how-675341/
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/changing-oil-metering-pump-omp-while-car-my-how-675341/
#19
Original Gangster/Rotary!
iTrader: (213)
I just popped in to point out that 15 inches of vacuum at 1500 rpm is actually pretty poor and certainly doesnt mean the motor is healthy, but a combination of the large port and the car running uber-rich in limp mode is probably the cause for the low vacuum, I wouldn't look to the compression of the motor as suspect at this point.
I have to ask, what shop let the car leave in this condition?
I have to ask, what shop let the car leave in this condition?
#22
Eh
iTrader: (56)
Installing the resistors is extremely easy if the connectors or wiring for the connectors are still present.
If the connectors are present, you can crimp on or solder on male spade connectors on to the end of the 330ohm 1/2 watt resistors and plug the male spade connectors into the connectors on the wiring harness. Do this for all the colored connectors that control the sequential and emissions equipment. ( one day I will figure out which ones cause limp mode but I havent spend the time to find the exact ones at this point).
If the connectors have been cut, solder/crimp the resistors directly to the wires in teh factory wiring harness for each connector.
If all the wires have been removed, time for a new harness if you arent good with wiring/electrical
If you need a good omp, I will sell you one for $45.00 SHipped. If you dont want to fully replace the omp at this time you can just plug in a known good one and tie it out of the way so the computer is happy and just premix for the time being. With the car being non-seq and likely emissions deleted changing the OMP is a breeze.
If the connectors are present, you can crimp on or solder on male spade connectors on to the end of the 330ohm 1/2 watt resistors and plug the male spade connectors into the connectors on the wiring harness. Do this for all the colored connectors that control the sequential and emissions equipment. ( one day I will figure out which ones cause limp mode but I havent spend the time to find the exact ones at this point).
If the connectors have been cut, solder/crimp the resistors directly to the wires in teh factory wiring harness for each connector.
If all the wires have been removed, time for a new harness if you arent good with wiring/electrical
If you need a good omp, I will sell you one for $45.00 SHipped. If you dont want to fully replace the omp at this time you can just plug in a known good one and tie it out of the way so the computer is happy and just premix for the time being. With the car being non-seq and likely emissions deleted changing the OMP is a breeze.
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