leaning out
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- Posts: 11
- Joined: Fri Mar 11, 2005 11:12 pm
leaning out
My car was tuned last year with an S200. I have a 94 1.8l vtec. Now for no apparant reason over 10lbs of boost it leans out. Map sensors is working, fuel pressure is good, and timing is set right. We have tried to add fuel ( alot ) and it still leans out bad, like into the 14's ( the car was tuned to have a 10.5 a/f ) After adding fuel it started hitting the rev limiter, first run at 5,000, 2nd run at 4,000 then the 3rd ran was around 3,000rpm. Datalog showed rpm was spiking to 666,000rpm. I have bypassed my msd digital 6 ignition ( So thats not the problem ) and have used a different chip with a new map burnt on it with no luck. If anyone has any suggestions i would greatly appreciate it, this has been beating for 3 weeks now and we cant seem to narrow down the problem. Almost seems like the timing is being advanced causing it to lean out.
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- Joined: Fri Mar 11, 2005 11:12 pm
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- Posts: 11
- Joined: Fri Mar 11, 2005 11:12 pm
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- Posts: 11
- Joined: Fri Mar 11, 2005 11:12 pm
I dont have the datalog on my laptop as the car is at the tuners shop 2 hr's away. Not sure what you mean by the calibration the car was running. Keep in mind that this wasn't a new tune, i drove the car for over a year without a problem.....then all of a sudden this stuff starts. I talked to my tuner tonight and he think that my MSD coil might be causing some sort of a interferance with the timing or the ECU. As stated before i did remove the MSD digital 6 but still had the blaster coil hooked up. My question is, is there any history with msd coils interfering with a Hondata setup?Spunkster wrote:In addition to trying it in another car, please post the calibration the car was running as well as a datalog showing the problem.
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- Joined: Fri Mar 11, 2005 11:12 pm
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- Posts: 11
- Joined: Fri Mar 11, 2005 11:12 pm
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- Posts: 11
- Joined: Fri Mar 11, 2005 11:12 pm
well mostly all tuners try to tune the car on its lowest ECT and lowest IAT cause usually when either go high on normal driving fuel gets richer and timing gets retarded! myself my cars IAT is going really high in the summer and i can notice am getting 18 deg at ~8psi! thats considered as allot of timing retard cause the compensation table is doing its job! not to mention am having coolant temp problems!
check your datalogs to see everything is all good before going any further....you will know if your compensation tables are doing adjustments that leaded you to this situation!
check your datalogs to see everything is all good before going any further....you will know if your compensation tables are doing adjustments that leaded you to this situation!
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I understand what your saying, but this isn't a new tune. One day out of the blue it starts acting like this. Is it possible for those compensation table to mess up that long after a tune?KamalEK9 wrote:well mostly all tuners try to tune the car on its lowest ECT and lowest IAT cause usually when either go high on normal driving fuel gets richer and timing gets retarded! myself my cars IAT is going really high in the summer and i can notice am getting 18 deg at ~8psi! thats considered as allot of timing retard cause the compensation table is doing its job! not to mention am having coolant temp problems!
check your datalogs to see everything is all good before going any further....you will know if your compensation tables are doing adjustments that leaded you to this situation!