[GrayChallenger13]

Ok, this is a worst nightmare scenario... I am helping friend piece back her Durango after a shade tree mechanic took advantage of her in my book.

There are so many unknowns to this I would just have her sell me the truck for scrap but she's into it too deep now.. Ok enough of the sob story here's what I'm having trouble with.

For some reason she had the engine changed and every since she had it worked on it has a run on pre-ignite issue and mysteriously stalls, we checked the distributor and it appeared tight, we found a smashed harness to the CSPS and repaired that as well as replaced the CSPS with no luck.

You have to crack the throttle to get it to start when warm after it dies. It only dies at then end of an excel or at a stop sign or turn, it is fine at idle.

When you shut it off it pre-ignites until the engine is warmed up. Then that issue goes away. The only code we are getting is an O2 code. We have a ABS light from the brakes we went thought the brakes for her and haven't dealt with the light yet.

Any suggestions or pointers would greatly be appreciated, I hope he put the right engine in and there is not a CPU problem I haven't checked the vin yet to see if he used the right engine.

Thank you!!
GrayChallenger13

 

[GrayChallenger13]

Ok tonight messing with it, I noticed if I shut the key off fast it shuts off with no run on, there is slop in the ignition and I'm wondering if I'm looking in the wrong place under the hood vs in the column, it would explain why there is no code I guess. If I turn the key off lesurily is runs on... Hmmmm, any suggestions?

 

[GrayChallenger13]

Hey everyone, thanks for your replies!

I was aware of the timing and PCM set up, I thought maybe if the guy thought it set the timing he messed with it and it could have left it loose. but never considered the fuel injectors not seating, the engine was a junk yard, and that's all I know, I don't understand why it was changed in the first place all she knows is that it didn't run.. Lol!

My scanner is just a acutron obd2 code reader, I'm looking to update and would like to get a scanner that would allow me more options any suggestions?

I will look at the items you all have suggested and post back. Thanks again!

 

[GrayChallenger13]

I'm afraid you mite be correct I think they charged her for an engine swap that she very well did not need. I hope not but I think it's the case.

My friend has one of the high end scanner / diagnostics units. He is taking the truck to his shop to see if he can find anything deep rooted as well as adjust the fuel system timing etc. we think the person who changed the engine messed with the distributor, we found some suspect wireing at the CSPS sooooo here we go! I will post what we find.

Thanks!!