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Q: engine won't start after sitting a few years on 1995 Ford Explorer

I am working on yjis for a friend it has good fuel presure and spark it pops and tries to start but won't start timing chain is mark to mark and changed the plugs ?????? 39 years on the line but been retired afew years
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Hi Dave it is the 4.0 SOHC
And I also put a little oil in the cylinders and of course the computor has no info
jlelandthomas or just Johnny
Well, you know the drill - it's fuel, spark, air and exhaust.

That engine is known for the o-ring intake gaskets to leak, and "pops" sounds like you might have an leak somewhere...that's one thing to look at. Fuel quality is something to look at -- did you drain and fill the tank with fresh fuel?

What was the reason the car sat for a few years?
I did not know about the o-rings I will check that but I am down to thinking stuck or sticking valves I squirted a good quality of carb cleaner while turning it over that should have ruled out the bad fuel .She said the transmision was bad it belonged to her sister and was given to her to fix if she wanted it I told her I would not do anything else to it until it is running and I got to check it all out .SOUNDS like I opened a bag of worms as we use to say ]]]]
Thanks Johnny
I honestly don't think stuck valves is your issue here.

If you had good fuel pressure, why the carb cleaner to help start it? Just a thought.

If it's sucking signficant air, a stone cold engine doesn't stand a chance. That's why I went with the leak.
Hi Dave just let know that even though it was responding it wound up being the computer
Thanks now I have another
Johnny .
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