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Running Horribly Rich With L24e Gear...

kalium
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kalium Contributor

kalium

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My L28 which is running an L24 ECU, L28 AFM and Green injectors (I'm assuming they are L28 items...) is giving me grief.

I originally had some problems where the car had some manifold leaks, and it would sound lke a tractor and really not make much power. It did though idle nicely and rev smoothly. I took the manifolds of and fixed the leaks. Put it all back together, went to start it back up and it was idling ROUGH, like barely going. Wouldn't even rev. Pulled the plugs and they were soaked in petrol. Woudn't even start now unless I cleaned the plugs first, and even then it would only run for a half a minute before dying again and soaking the spark plugs.

I checked and made sure that the injectors were actually firing (not just stuck on), and checked the cold start valve.Tested the AFM and the TPS (and they appeared to give back the correct resistance readings).Even tried my spare L24 ECU. Only thing I haven't tested yet is the water temp sensor, and thermotime switch. Although I'm not sure if its even possible they could be causing this over fuelling problem. I'm also going to check the fuel pressure to make sure the presure regulator is working.

Is there likely to be an issue with using the L28 AFM with the L24 ECU? Could any vacuum leaks have been covering this up before?

Cheers

Ray

OUTATIME Community Regular

OUTATIME

Posted
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had similar problem after i changed the head gasket on my old r30. was the fpr.

was also runnin l28e afm but was all good. their the same as far as i could tell, only different spring tension on the flap which is easy 2 change. not sure bout the injectors but would say they would b bigger? think l28's r 188cc. not sure what l24s are. but then again i ran 260cc (vlt) injectors when bolted a turbo on and would still run ok, just rich as..

kalium Contributor

kalium

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had similar problem after i changed the head gasket on my old r30. was the fpr.

was also runnin l28e afm but was all good. their the same as far as i could tell, only different spring tension on the flap which is easy 2 change. not sure bout the injectors but would say they would b bigger? think l28's r 188cc. not sure what l24s are. but then again i ran 260cc (vlt) injectors when bolted a turbo on and would still run ok, just rich as..

Weird that'd it would just crap out all of a sudden. I've got a pressure gauge coming in the post but I may not bother waiting as I can get a replacement FPR reasonably cheap anyway.

jrh001 Proficient

jrh001

Posted
Posted
Weird that'd it would just crap out all of a sudden. I've got a pressure gauge coming in the post but I may not bother waiting as I can get a replacement FPR reasonably cheap anyway.

Hi,

Found this note (but can't comment on the quality of the advice):

"An easy way to test for an FPR leak in the vacuum side is to replace the vacuum line going into the FPR with a length of clear tubing. Now you'll be able to see leak as it happens. IT will most likely show failure when your vacuum is at its lowest point, as in during acceleration."  (on http://autorepair.about.com/od/troubleshoo..._fpr_inspt.htm)

JohnH

  • 2 weeks later...

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