I got this car as payment for some work I performed on an auto shop's building, figured I could flip it and make a little extra money.
When I got the car the only issue was it was blowing the cap off the power steering pump and up chucking power steering fluid and it had a miss on cylinder number two. Tackled the rough running first and determined it was a coil pack found one in a junkyard that looked brand new and installed it and the car ran fine.
Fast forward a couple months, I decided to try to tackle the power steering issue I drove the car to a local car wash no problems (other than the power steering. (We actually have driven the car here and there several times), got out to get change etc, got back in the car, started it up, put it in reverse and when I went to put it in drive so I can pull in and rinse the engine off it quit running. Never got engine wet etc.
The car will run if you hold the key in "start" position (trying to find the sweet spot so the starter doesn't run on is virtually impossible).
I was limited on tools etc, but here is what I have done/learned:
1. Checked spark with a spare plug and wire there is spark when engine cranks but as soon as key is released, no spark (update now only throws one spark on crank then nothing)
2. Replaced ignition switch with new one, same symptoms.
3. Grabbed a junkyard coil pack that looks virtually new, same situation
4. Checked fuel by depressing Schrader valve, enough pressure to darn near blow through the hood also, scantool reports frp in hi 30's.
5. Scantool reports ECT=37 (this is the ambient temperature outside), RPM 0 then starts at about 60 when cranking up to 170 or so, MAF 0 and went up to 1.7 or so while cranking, TPS responds to peddle movement (can't remember exact numbers).
No fault codes set.
I know older ignition circuits would start on 12 volts then cut back to approximately 5 volts or so in run is that still true on these "modern" cars?
Haven't really found a good wiring diagram but is there a resistor on the coil pack?
Any help would be greatly appreciated!
*UPDATE- I was going through and rechecking everything and when I got to the coil pack, I just happened to notice that center ground wire is grounded all the time even with the key off. So when I get a little more time, I'm going to check the wiring to the PCM but it's looking more and more like a bad PCM and unfortunately I think that's a little too much to spend on this turd.
Wednesday, December 2nd, 2020 AT 8:52 AM