lunchbox99

94 5.0 just installed MSD blaster coil, 8.5mm wires, BBK equal length headers, and autolite platnium plugs. That took care of my check eng. light but I still get a slight mis at part to full throttle and some hesitation sometimes. When I have the A/C on some times it runs awsome but it is usually joined by a nice PING. Anyone have any ideas? It would be much appreciated!

klown

im not real sure on what to do but it could just be the octane of the gas. try to run 91 and higher in it.

Quik

get the codes pulled. could be caues youre running lean, clean the maf and check vaccum lines

92hatchLX

What's your timing set at? I'm with QUIK, you're probably running lean.

Quik

my truck thru a code of P0171 and anothe one just like it. said the left bank was running 25% lean. same with the other side. it ended up being the air tube came off teh TB

wildstang87

yeah, definately pull the codes. check out the EGR valve and curcuit. the 94-95s are notorious for this complaint, and it usually turns out to be a dirty/faulty MAF, or the EGR curcuit malfuntioning. if the egr is sticking open slightly upon light to moderate throttle it will bog the motor down. but start by pulling the codes, also get the timing checked.

lunchbox99

Thanks for your help! I don't have time to check it out until sunday. I will post results.