My 1994 Pontiac Grand AM 2.3 Quad 4 lost power on me on my way to work and then would not start again. Once I got it back to my house my cousin, who is a mechanic of 15 years, and I tore into it. We checked “almost” everything there is to check and still couldn’t figure this one out. It has 158000 miles on it by the way and we got it to start once we replaced the lazy starter. The problem is when you pull the #1 and #3 plug off of the injectors nothing happens, but the #2 or #4 plug kills the engine. We have good compression, spark on all four plugs, pulled the fuel rail and have good mist on all four injectors, changed the crank sensor, since it broke on us, checked for continuity in the coil housing and swapped out with another “old” one, changed the coils with two different “used” sets and swapped them around all three times, swapped out the computer with another one “from another quad 4 ‘same year,’” changed the plugs, checked the boots “good condition almost a year old” same problem. The only thing we can think of is the module but that is a $160 guess and we tried another “old” one. There is no CEL on; would a bad module through a code? Is it worth spending the money for a diagnostic $90 + getting it there? We are both stumped. We’ve got spark, gas and air but no fire. What else does #1 and #3 have in common? Please HELP!!! Thanks.
Apr 3, 2006 at 1:34 AM