#5.7 VORTEC DISTRIBUTOR TIMING HOW TO#
Thank you for any advice/suggestions on what to check and how to proceed. Could that cause my problem, or do I just have a host of issues all coming together to make my 'burb run like a turd? bad tps, bad timing, bad ect, bad transmission.
#5.7 VORTEC DISTRIBUTOR TIMING CODE#
I've heard that anything outside of +/-11 will set a code but that the real spec is +/-2. The other thing the "CMP Retard" ranges between -11 and -10. I checked the throttle position sensor, and while it seems alright, there were some small dips in the graph, so I have a new one ready to put in tomorrow. Fuel trims are close to +10 at most times. I change the coolant temp sensor (the one at the front where the thermostat is) and now it actually fluctuates, but it's still in the range of 19x-20x when warmed up. Everything looks to be alright, but my coolant temp seemed to hang at 194 when the truck warmed up. I have a reasonably advanced Bosch scantool. While I know the MIL works as it shows up when the key is turned on, it's never gone on by itself. It seems a bit down on power, and it intermittently idles really low/rough to the point at which I thought it would stall out (but it didn't).
By the time I get to work it's warmed up and it runs better but still not like I would expect. When the truck is cold in the morning it just falls flat on its face when I try to merge into traffic from my parking lot. Well, I don't know if that has anything to do with it, but worth mentioning, because ever since my issue has come back and it's worse than ever. I had it towed to the shop and the water pump replaced twice (the first one was defective). It pissed coolant everywhere, but the failure seemed to happen as I was just arriving at my destination so I don't think it overheated - the gauge never went above normal. The truck did still seem slightly slower in the morning than what I deemed to be normal but I didn't think much of it up until now. It still did it, so I added K&W TransX and the issue seemed to get much better. Basically it would shift badly and seemingly have no power to move forward though the engine would somewhat rev, so I thought it was a failing transmission and had the transmission fluid+filter changed. About a month ago I was having a problem where on the first cold start drive in the morning the truck would not run well.
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