Quote:
Originally Posted by lorainfurniture
This is most certainly a fuel problem , specifically your injectors. They leak, or get clogged. You randomness on whether it will start /stall, start fine, is depending on which cylinder valve happens to be open/ closed at the time you shut off the engine.
Try a bottle of redline fuel additive ( this is the ONLY stuff that works) if that does not work, replace the injectors and seals.
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This engine is CIS, not multi-point injection. ALL SIX injectors flow fuel all the time at various rates, the fuel "distributor" as it's called, doesn't inject to various cylinders like EFI does. Which cylinder is "up" and which valve is "open" has absolutely nothing to do with what the fuel system is doing.
Replacing all of the injectors and seals straight away is expensive, time consuming, and likely isn't the problem here. Can they cause problems? You bet! But I'd be surprised if that was the issue here. If you had injector issues, I'd expect running issues such as stalling, rough idle, missing out, lack of power, etc.
I'd be willing to bet this is a supply issue, either vapor lock, something leaking down (check valves and such), or an enrichment issue such as a cold-start injector that isn't firing or an idle solenoid that's stuck closed.
It's easy enough to test if the idle solenoid is stuck closed. Simply pull the plug off of it. You should have a very fast idle (1500-2000 RPM). When you reconnect the plug, the idle should drop back to normal. The solenoid is a "pull to close" design with a spring return, so disconnecting the plug will force it "wide open". If the solenoid is stuck or sticking, you won't get much of a change if any at all.