Discussion Starter · #1 ·
Hey all you fellow Chevy guys, sorry for the long post, but I have two questions with a lot of background. Let me start from the beginning... I have a '97 K1500 with the V8 5.7L, two years ago it blew a head gasket so I took it down to the block, bored the cylinders over 30, ground the heads flat and did a total rebuild. I did put a few performance parts in while I was at it such as the electronic fuel injection spider, and a K&N cold air intake. It ran good for a while, still not the best, but good, back in the summer I reworked my exhaust with 2.5" tube, took the cats off, put fake O2 sensors in, headers, and a Flowmaster muffler, ran great and sounded good, and most recently, I replaced the factory distributor with an MDI HEI distributor, however, I've had an issue with cold starts from the very beginning, (I was hoping that all of the above would fix it, but it hasn't) when I first fire it up and try to go, it acts like it has no power and doesn't want to move, if I give it more gas, it backfires several times and still acts like it doesn't want to move, but then, about 30 seconds later it's like a switch flips and it takes right off and runs great from there on out. It also does it if I stop for a few minutes ie. to get gas, so the engine is still hot. I also have a new problem where it throws a code saying there's an issue with the Cam Sensor, however the Cam Sensor is built into the distributor so I can't imagine that being the real issue, but when I first start it up and still have it in park, it idols strange, oscillating between high idol and such a low idol it almost dies, but if I throttle it up to around 2.5K RPM's for a few seconds it idols smooth after that, also while driving down the road it's almost like it misses really hard when I let off the throttle or am in a high gear and begin going up a grade and gets a load on it. Any help would be awesome, sorry again for the long post... Skoal Man out.