Thread: I have spark, fuel and it cranks but no start

DMM=Digital MultiMeter

Are you sure your fuel pump is good? I know you changed it but maybe it wasn't a good one? It run runs if you add secondary fuel but sometimes u get bad parts.

I'm only going to suggest this because it seems like you have tried all the obvious stuff. I had somewhat similar symptoms on a late 90's GM truck where it would run on starter fluid and occasionally run for a trip and then fail to start the next time. I'll skip all the trials and errors but for me ultimately it was a battery that was only slightly failed. It wasn't storing at 12v more like 7-8-9v. Enough to run the fuel pump and sometimes supply full pressure but sometimes not. If it did fire up the alt would give 14v and keep stuff running for 1 trip.

Anyhoo good luck - but maybe check your batt voltage both at rest and during crank.