Hard shut down

[droppinbottom]

I purchased my 90 talon a few months ago and I have noticed that when I turn the car off it seems to have a hard shut down. Almost like the motor wants to turn over one more time after I turn the key off. Has anyone else experienced anything like this? If so any ideas about a possible fix would be arrreciated


thanks

DB

 

[Quasimondo]

Sounds like the engine is dieseling, which is odd since that is something usually associated with carbureted engines.

 

[JusMX141]

Dieseling can also occur on injected vehicles with poor ignition timing. Check your timing and repost.

 

[droppinbottom]

Is there another way to check the timing without a timing light?

 

[JusMX141]

I'm sure someone out there has derived a method to adjust timing without a light.....however that someone is not me. I always use a light, it's the only way to go. I know a kid who picked up a '90 GSX super-cheap because the seller was sure something was horribly wrong with the car because it made absolutely no power. Turns out the timing was WAY retarded and once it was adjusted properly the car ran 100% better. It's worth a shot....you should always check on these things when you purchase an older used car, you never know what the previous owner might've done to your car if he had a new wrench set and a free weekend on his hands.

 

[droppinbottom]

With my situation in regards to the motor I had it built at a reputable shop here in the area and I know he has adjusted the timing a bit. When I first got my logger we went and made a few 3rd gear pulls on the highway and when the car started getting a little knock he would stop and retard the timing a bit and kept adjusting the timing till we could get some decent pulls without any knock. So in reality I have no clue as to what the timing is set to.

 

[kenamond]

Stupid question maybe, but wouldn't timing have nothing to do with dieseling if there is no spark (he shut the car off)? Seems like the only thing that could make it diesel is if it had some source of fuel after the car was shut off...maybe a bad injector bleeding fuel off of the fuel rail into a cylinder? The fuel controller should stop pulsing the injectors when you cut power, shouldn't it?

Also, could it be carbon buildup in the combustion chamber holding excess fuel?