2004 Durango 5.7 Trouble Starting
#11
I had a similar situation but was not quite as bad. Ended up being the fuel pump. After it would sit, the fuel PSI would bleed off, so the next time we went to start it, it would have to re-fill the lines from the pump to the rail giving the extended cranking scenario. Wouldn't happen "every" single time though.
Unfortunately, fuel pumps for these 5.7s are NOT cheap...
Unfortunately, fuel pumps for these 5.7s are NOT cheap...
#12
Update:
I brought this to a shop to diagnose and it turns out that I had an intake leak. They replace my intake gaskets and cleaned my throttle body. The starting problem is now gone. However, I immediately developed a new problem. Once the TB was cleaned the engine started to have a high/low fluctuating rev problem, bouncing between 700-1200 RPM's. It was indicated that I would need the PCM reflashed.
I took it to the dealer on Wednesday and they reflashed. The problem went away for a day and this morning on my way to the bus stop, the red lightning bolt came on an the truck's RPM's bounced between 1000 and 2000. I restarted and it was fine. got to the bus stop and put it in park, and the RPM's started bouncing between 700-1200 but the lightning bolt went out.
Thoughts?
I brought this to a shop to diagnose and it turns out that I had an intake leak. They replace my intake gaskets and cleaned my throttle body. The starting problem is now gone. However, I immediately developed a new problem. Once the TB was cleaned the engine started to have a high/low fluctuating rev problem, bouncing between 700-1200 RPM's. It was indicated that I would need the PCM reflashed.
I took it to the dealer on Wednesday and they reflashed. The problem went away for a day and this morning on my way to the bus stop, the red lightning bolt came on an the truck's RPM's bounced between 1000 and 2000. I restarted and it was fine. got to the bus stop and put it in park, and the RPM's started bouncing between 700-1200 but the lightning bolt went out.
Thoughts?
#13
I beleive I fixed it...
When I cleaned the throttle body, I loosened the set screws for the butterfly plate in order to clean around the edges. When I tightened the screws, I didn't push the plate forward to completely close the throttle spacing and center the plate. This left a 1/32 inch gap when the TB tried close and consequently probably caused ever so slight binding only detected by a sensor. I re-seated the plate and all is good. Idles steady at 600RPM.