Let me take a shot at this. Spray heavy dose of starting fluid and see if the engine will turn over with combustion. If it does you can pretty much conclude is a fuel control problem. If it does not then it is a timing problem and I mean ignition, cam, injectors, whatever that is not correctly timed.
When you plug a wire out in open air to verify spark on a cold start if you put your injector pulse through a scope your computer get a signal as starting it length at least four times on injector pulse to richen up the system in order to start so if you do not have a signal and get extra fuel to kick start, guess what it is not happening?
If this is an intermediate problem on this guy then we can pretty much rule out compression, if you have bad mechanical problem it is not happening no matter what.
Service writer maybe right on coolant temperature sensor which is another form of fuel control. As a mechanic who makes a living on commission no time for that research and development spray and it does not work then I do not have to pull scope, scanner and move on to something else. What do you think guys?
Sunday, June 10th, 2007 AT 10:39 AM