I'll give a brief history:
Van ran fine, then developed a stall-like hesistation when first accelerating from a stop when engine warm but not cold. This turned worse within a few weeks but was still drivable. Finally, the van would only sputter, maybe it was even a backfire, it was obviously misfiring.
I was able to put a scan tool on it. I received a code of 26. This is a fuel injector bank high resistance code. Fine; I replaced all the injectors and cleaned and very lightly greased the connectors of the injector harness. The van started but was still sputtering or missing. But it was a huge improvment over its' previous operation. The code went away as well.
I put a timing light on the engine and observed the timing mark jumps between about 10 and 15 deg. btc. I have also checked the MAP sensor and the coolant temp sensor, both appear to be operating normally. The distributor cap and rotor as well as the plugs have been changed a few months prior to this all starting. The old parts looked 'normal' in wear.
My questions: Where would be a good place to start looking for the problem? (Van still sputters/misses. Some stalls when starting from stop sign. No trouble codes) On a wild thought, could this be a problem with a the timing belt? The timing mark jumping around did not look right to me.
Before I go further in chasing rabbits, I'd greatly appreciate some insight from all of you. This has been a great little van with no other problems in
150k miles. Only replaced the normal things so far.Thanks for any replies!
Ric