Engine: s13 sr20det
Parts: front mount greddy, mechanical boost control, hks ssq, new spec stage 2 with new spec flywheel, walbro 255
Problem: So i've had the engine in the car for a few months now, and i've noticed that the engine will either run perfect and feel awesome, or it will run kinda boggish. By this i mean it doesn't have the same response when i accelerate. if you could imagine the feel, it feels like theres too much fuel. Also i can smell extra fuel when i drive, its not super overwhelming, but smelly enough to where anyone would know it smells like fuel.
Theres no specific situation when it feels boggy. Usually i'll start it up and it will either run well or not as well. And i've noticed that when i get off the freeway running about 80-85 mph it runs better like the higher rpms would force out any extra fuel or something. any input would be great.
Oh and i have a nismo adjustable fpr and a autometer gauge to go with it but i haven't installed them yet. What do you guys think?
engine alternates between perfect and boggish
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IanS
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Re: engine alternates between perfect and boggish (seanman)
Id say get the FPR installed.
What spark plugs are you running, what heat range are they, and what are they gapped to?
How much boost are you running, and have you checked your ECU codes lately?
What octane fuel do you run?
Do you have to crank the car abnormally long when its cold?
What spark plugs are you running, what heat range are they, and what are they gapped to?
How much boost are you running, and have you checked your ECU codes lately?
What octane fuel do you run?
Do you have to crank the car abnormally long when its cold?
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Koshin
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Re: engine alternates between perfect and boggish (FlatBlackIan)
Just wondering why that particular question?? Just wondering..The rest I understand, this I do not. u seem to really know the ropes, thats why I ask.FlatBlackIan wrote:Do you have to crank the car abnormally long when its cold?
Than ks
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IanS
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Re: engine alternates between perfect and boggish (caddylt1)
A leaking fuel injector, injector O ring, or pressure regulator can cause odd and sometimes intermittent driveability issues. The fuel will not always leak externally, but pressure in the rail bleeds off, so cold starts require an abnormal amount of cranking.caddylt1 wrote:
Just wondering why that particular question?? Just wondering..The rest I understand, this I do not. u seem to really know the ropes, thats why I ask.
Than ks
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Koshin
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Re: engine alternates between perfect and boggish (FlatBlackIan)
that makes perfect sense, you know your sh_t.
Re: engine alternates between perfect and boggish (FlatBlackIan)
OK! sorry i haven't been able to reply at all. I do not know what the spark plugs are or what they're gapped to. They're the original ones that came in the engine. im at 10psi with 91 octane pump fuel. And she starts up easily no matter what the condition. Ill be heading over to NAPA tomorrow to get fuel line and connecting pieces for my fuel pressure gauge.FlatBlackIan wrote:Id say get the FPR installed.
What spark plugs are you running, what heat range are they, and what are they gapped to?
How much boost are you running, and have you checked your ECU codes lately?
What octane fuel do you run?
Do you have to crank the car abnormally long when its cold?
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IanS
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- Joined: Thu Dec 23, 2004 3:07 pm
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Re: engine alternates between perfect and boggish (seanman)
I would recommend picking up a set of BKR-7 NGK spark plugs, either copper or Iridium if you can get it, stay away from platinum. Gap the plugs to .030.seanman wrote:
OK! sorry i haven't been able to reply at all. I do not know what the spark plugs are or what they're gapped to. They're the original ones that came in the engine. im at 10psi with 91 octane pump fuel. And she starts up easily no matter what the condition. Ill be heading over to NAPA tomorrow to get fuel line and connecting pieces for my fuel pressure gauge.
Also, check you coilpacks for cracking.
Do you have any ECU codes?
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IanS
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Re: (seanman)
You don't need a tester, just turn the screw on the ECU then count the LED flashes.
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IanS
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Re: (seanman)
On the side of the ECU, there is a little hole, there should be a sticker pointing to it, you can search for the procedure to pull codes from a redtop ECU.seanman wrote:i didn't know there was a screw... where is it?
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WoolyS14DET
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Re: (FlatBlackIan)
Sounds like you got this under control !!!!FlatBlackIan wrote:
On the side of the ECU, there is a little hole, there should be a sticker pointing to it, you can search for the procedure to pull codes from a redtop ECU.