Hi, everyone! Hope you can help me with this:
Bought my R50 truck in April and immediately had to replace the MAF sensor and a torn air duct at the throttle body. This fixed a bad stalling problem and it now runs flawlessly - when it starts, which is 99% of the time.
The trouble is a weird - and relatively rare - flooding condition. Most of the time, it will crank and start right up. Sometimes though, usually after a cold start and short trip and a shut down to go in a store for 5-10 minutes, I turn the key and it will crank but not start. Then, I can smell fuel (it really smells more like oil-based paint).
Sometimes when this happens, before i smell fuel, I can keep cranking for a few seconds and crack the throttle slightly, and it'll start. If that doesn't work, I can sometimes get it to go by re-cranking while holding the accelerator to the floor. Then there are the infuriating times when nothing works and I have to just wait 5-10 minutes and then it'll crank and start right up normally. It seems more likely to do this last bit on cool, damp nights.
It seems that it's the once a week or two weeks random key turn where something is causing a fuel dump or no spark for THAT one key turn only. Once it starts, it runs flawlessly. No SES light code or anything.
I've checked or replaced air filter, plugs, wires, dist cap and rotor, all connections. Tested relays and primary and secondary resistance on the dist. Fuel pump and relays seem fine as well. Have tried injector cleaner in gas tank. It does seem to happen less often if I stick to 87 octane instead of midgrade 89. Timing is set to 16 degrees.
I just can't find a thing wrong, and when it happens I only have that 5-10 minute window to noodle with it - usually while I'm not dressed for the occasion.
Any clues, suggestions, or comments welcome! This is driving me nuts!
Thanks!
