First thing I always check on a TBI engine that's over fueling is the coolant temp sensor (CTS). Make sure key on engine off (KOEO) with the engine cold that the value of the CTS and the ambient air temp are nearly the same.
First thing I always check on a TBI engine that's over fueling is the coolant temp sensor (CTS). Make sure key on engine off (KOEO) with the engine cold that the value of the CTS and the ambient air temp are nearly the same.
89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
I appreciate the input Brian. Anything will help me understand my motor just alittle more. Its a high mileage engine (318K). It seems to be still running great now and it would make me happy to help the idle. You wouldn't happen to know what I would need to look at when it comes to my miss at idle when its warmed up would you? I figure I would need to watch the spark advance to see if I have any abnormalities with it. I almost begin to suspect my distributor is what will need to be replaced due 2 the rust on the wheel below the rotor
With that many miles there are more than a few suspects. In my experience the old rusty (broken magnets) reluctor wheel in the distributor only causes issues under heavy load. Work on getting TunerPro connected and post a log so we can look at the data.
89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
If I am to datalog, will I need to buy Moates aldu1 datalogger?
Once again, I appreciate the help.
All you need is TunerProRT and the ALDL cable.
89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
Awesome! Hopefully I get my cable in tomorrow and start logging this weekend!
managed to log my engine and already noticed a few things such as the spark advance spiking up as soon as the engine misses and as soon as I hit the throttle, the spark advance will drop down real quick and then come back up.
This is actually my second datalog but, i think it had more information as to whats going on compared to the first one.
I would love to understand as to what parameters I should be in for a stable, no issues engine.
Oh by the way, I have also done a few other checks as well
fuel pressure 13psi
vacuum: 20-21" in park & 18-19" in drive
compression: 170-180 psi after 5 to 7 seconds of cranking.
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