B18C Turbo Idle problems, any ideas?
08-23-2003, 02:20 AM
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B18C Turbo Idle problems, any ideas?
I was wondering if anybody can diagnose my idle problem.
First, I am running Hondata Stage 2B on a B18C at 6 psi max boost using a T3/T4.
My problem is the car dies at idle after it has heated up.
Could this be a timing issue? I replaced the igniter in the distributor, and marked the distributor, but perhaps I put it back on off a degree or two.
The symptoms are as follows:
Car starts fine when it is cold. Once the car warms up, the idle revs up and down. I believe the car is flooding at idle. I was running a stock GSR fuel pressure regulator to replace a failed adjustable FPR.
I have since replaced the GSR FPR with an AEM FPR, and it seemed to help considerably. However the car still dies, but now it will usually restart hot. When using the stock FPR, it would not. I am using an STR fuel rail and 440 cc RC injectors.
The car runs well at WOT and partial throttle.
Any ideas on what else could be wrong? IAC Valve, TPS, air in the coolant, etc.
If anybody else has had a similar problem, please let me know what the fix was.
Thanks, and sorry for the long post.
First, I am running Hondata Stage 2B on a B18C at 6 psi max boost using a T3/T4.
My problem is the car dies at idle after it has heated up.
Could this be a timing issue? I replaced the igniter in the distributor, and marked the distributor, but perhaps I put it back on off a degree or two.
The symptoms are as follows:
Car starts fine when it is cold. Once the car warms up, the idle revs up and down. I believe the car is flooding at idle. I was running a stock GSR fuel pressure regulator to replace a failed adjustable FPR.
I have since replaced the GSR FPR with an AEM FPR, and it seemed to help considerably. However the car still dies, but now it will usually restart hot. When using the stock FPR, it would not. I am using an STR fuel rail and 440 cc RC injectors.
The car runs well at WOT and partial throttle.
Any ideas on what else could be wrong? IAC Valve, TPS, air in the coolant, etc.
If anybody else has had a similar problem, please let me know what the fix was.
Thanks, and sorry for the long post.
08-23-2003, 02:16 PM
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Re: (nigel)
How can you check an injector to see if it is working properly?
And can cleaning fix the problem?
Also, what kind of injectors were you using, and which one went bad?
Thanks.
And can cleaning fix the problem?
Also, what kind of injectors were you using, and which one went bad?
Thanks.
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09-02-2003, 09:43 PM
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Re: (cr00klyn718)
cr00klyn718,
I have been working on it. But haven't found the problem yet. The car sometimes won't idle well when hot. And it dies a lot at stoplights. And once in awhile is very hard to start after it dies. I think it is possibly flooding at idle.
I got a new fuel pressure regulator, as I was running the stock GS-R one, that helped some. Stock FPR pressure was too high, I think.
I had a new downpipe made, and got all of the exhaust leaks taken care of, put new studs in for the manifold, and new studs for the turbo (downpipe flange). And all this was helping. I did not put the o2 sensor back in yet. I am having a bung welded in for the O2 sensor in the new downpipe. However, I don't think this is the problem. The ECU is throwing no error codes without the 02 sensor.
Perhaps, a sensor is dirty or malfunctioning? However, I thought this would throw an ECU code.
My current theory is:
1. Injector is leaking too much fuel at idle. Need to be sent to RC for cleaning and blue-priting.
2. No O2 sensor is causing ECU to run off a set fuel map, which happens to be too rich to properly idle off of.
3. Need to get the Hondata tuned, (injector cycle is too high at idle?) Only problem, nearest Hondata dealer, 550 miles, in SLC. Nobody knows how to tune them here. I am one of 4 turbo Hondas for quite a distance. All others using FMUs.
4. ?
Any ideas? I appreciate any help.
I have been working on it. But haven't found the problem yet. The car sometimes won't idle well when hot. And it dies a lot at stoplights. And once in awhile is very hard to start after it dies. I think it is possibly flooding at idle.
I got a new fuel pressure regulator, as I was running the stock GS-R one, that helped some. Stock FPR pressure was too high, I think.
I had a new downpipe made, and got all of the exhaust leaks taken care of, put new studs in for the manifold, and new studs for the turbo (downpipe flange). And all this was helping. I did not put the o2 sensor back in yet. I am having a bung welded in for the O2 sensor in the new downpipe. However, I don't think this is the problem. The ECU is throwing no error codes without the 02 sensor.
Perhaps, a sensor is dirty or malfunctioning? However, I thought this would throw an ECU code.
My current theory is:
1. Injector is leaking too much fuel at idle. Need to be sent to RC for cleaning and blue-priting.
2. No O2 sensor is causing ECU to run off a set fuel map, which happens to be too rich to properly idle off of.
3. Need to get the Hondata tuned, (injector cycle is too high at idle?) Only problem, nearest Hondata dealer, 550 miles, in SLC. Nobody knows how to tune them here. I am one of 4 turbo Hondas for quite a distance. All others using FMUs.
4. ?
Any ideas? I appreciate any help.
09-02-2003, 10:04 PM
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Re: B18C Turbo Idle problems, any ideas? (Buster T)
Is your car obd2?
If it is, I might be the EVAP purge valve symptom. Just pull the evap purge valve and you should be fine IF your car is obd2 and running an obd1 ECU.
I had this problem on my 99 Si and I lookeup it up @ hondata and they said to just pull the EVAP purge valve connector, and then all my weird startup symptoms went away.
If it is, I might be the EVAP purge valve symptom. Just pull the evap purge valve and you should be fine IF your car is obd2 and running an obd1 ECU.
I had this problem on my 99 Si and I lookeup it up @ hondata and they said to just pull the EVAP purge valve connector, and then all my weird startup symptoms went away.
09-02-2003, 10:12 PM
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Re: B18C Turbo Idle problems, any ideas? (LiLOtaku)
LiLOtaku,
Thanks for the help.
My car is running a PR3 ECU, and OBD-0 JDM SiR ECU. I don't know if it has an EVAP purge valve.
Do you think that you could post the Hondata link? Thanks.
Thanks for the help.
My car is running a PR3 ECU, and OBD-0 JDM SiR ECU. I don't know if it has an EVAP purge valve.
Do you think that you could post the Hondata link? Thanks.
09-02-2003, 10:27 PM
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Re: B18C Turbo Idle problems, any ideas? (Buster T)
http://hondata.com/bb/viewtopic.php?t=343
There ya go Buster. look on page 2 of the thread.
If your car is obd2, I'm 90% sure it has an Evap purge valve. Mine was located right on my fuel rail, and I just disconnected the connector.
The Evap purge valve is an obd2 thing, so the obd1 ECU doesn't use them from what I heard.
I'm afriad I don't know where they are on GSR motors.
There ya go Buster. look on page 2 of the thread.
If your car is obd2, I'm 90% sure it has an Evap purge valve. Mine was located right on my fuel rail, and I just disconnected the connector.
The Evap purge valve is an obd2 thing, so the obd1 ECU doesn't use them from what I heard.
I'm afriad I don't know where they are on GSR motors.
09-02-2003, 10:38 PM
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Re: B18C Turbo Idle problems, any ideas? (LiLOtaku)
Thanks, LiLOtaku.
Apparently, the EVAP purge control solenoid valve on an Integra is on the upper right side on the top of the intake manifold (according to the Chilton's manual).
I have an '89 CRX with a GSR swapped in, so it might be there, might not. I also have an aftermarket fuel rail, but it appears to be in a different place from your car.
I am certainly going to go check it out. Thanks, dying at stoplights is not any fun, and neither is the fluctutating idle.
Apparently, the EVAP purge control solenoid valve on an Integra is on the upper right side on the top of the intake manifold (according to the Chilton's manual).
I have an '89 CRX with a GSR swapped in, so it might be there, might not. I also have an aftermarket fuel rail, but it appears to be in a different place from your car.
I am certainly going to go check it out. Thanks, dying at stoplights is not any fun, and neither is the fluctutating idle.
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