I've been defeated by my LT-1, Please help..REWARD
#21
A cold air intake will throw off the tune a tiny bit. So you changed the ECTS in the water pump, not the head? If I recall correctly the ECTS in the water pump controls the gauge and the one in the head is what the PCM uses. It must be in working order as fuel curves use the coolant temperature to dictate fuel. Cold engines need more fuel as fuel doesn't atomize well in cold temps.
Running rich can cause detonation, which is where I believe your knock is coming from. As I said you are pulling way rich, idle is way off.
Running rich can cause detonation, which is where I believe your knock is coming from. As I said you are pulling way rich, idle is way off.
#23
I wouldn't change out anything else until you have the PCM looked at or swapped out.
You could have already spent to much money to not have it solved.
#24
#32
9 Second Club
iTrader: (7)
moe is probably right it sounds like an opti issue..........while im dowloading datamaster onto my computer so i can look at that tune.....fox mentioned something a while back in this thread.....MAF error.....gotta wonder why? im wondering if the maf has gone bad and the pcm is trying to run in SD mode.....
#33
9 Second Club
iTrader: (7)
just looked at ur data log............ltft's are going rich......think its caused by the misfire.....misfire doesn't burn oxygen so it makes the O2s read a false lean so its trying to compinsate for an issue that isnt there........the misfire can also trigger the knock retard......im with moe on the opti on this one.......if it was a true maf failure it wouldn't be in CL fueling....
#35
Thanks for the feedback guys. Yes the MAF code was due to me running it with MAF unplugged.....I had no change in power with MAF plugged in or unplugged...If knock sensor is unplugged or wire broke, wouldnt it set a code? Fuel pump OK 35 at idle and 42 at WOT....Waiting to get laptop back will make another run.....Thanks again for the help...
#38
Thanks for the feedback guys. Yes the MAF code was due to me running it with MAF unplugged.....I had no change in power with MAF plugged in or unplugged...If knock sensor is unplugged or wire broke, wouldnt it set a code? Fuel pump OK 35 at idle and 42 at WOT....Waiting to get laptop back will make another run.....Thanks again for the help...
#39
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check maf wires
Thanks for the feedback guys. Yes the MAF code was due to me running it with MAF unplugged.....I had no change in power with MAF plugged in or unplugged...If knock sensor is unplugged or wire broke, wouldnt it set a code? Fuel pump OK 35 at idle and 42 at WOT....Waiting to get laptop back will make another run.....Thanks again for the help...