Fuel injection problem....although not on my tang

500 Views 3 Replies 1 Participant Last post by Guest, Mar 9, 2001

Discussion Starter · Mar 8, 2001

I have an 87 Aerostar, if the computer says it has less than 20 miles until empty, and I stop to get gas, If the engine is left runining, it is fine. However, if you turn it off and get gas, it Vapor Locks (I'm assuming) The van will NOT start. After a couple of hours, it'll fire right off. It did it to me today, and after about an hour, it wouldn't crank. I called a tow truck and had it pulled home. As soon as it hit the Ground, it fired right off. Anybody ever heard of this? Is There a quicker (and cheaper) way to get it recranked?

67 Coupe Project Car (Did I say project car, I meant Pile of Rust)

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390fastback

· #2 · Mar 8, 2001

If its just not cranking, it could be a bad battery conection, or if is cranking and not firing, could be a bad ground on the computer.

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68 fastback, 390 4V premium fuel
80 5.0 hatch, just finished
91 5.0 coupe, daily driver
84 RamCharger 4x4 extreme mudsliger and winter junker

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Discussion Starter · #3 · Mar 9, 2001

No, It's not electrical.....It's a fuel problem. It's happened 4 times now, and it's when it get down real low on gas, and is then refueiled. If I leave it running while refueling, it doesn't happen.

67 Coupe Project Car (Did I say project car, I meant Pile of Rust)

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Discussion Starter · #4 · Mar 9, 2001

Definitely not vapor lock since that does not happen with fuel injection since the line pressure is about 45 psi. Need to do a fuel pressure check. There is a bicycle valve on your injector fuel rail. The drill is to put a pressure gauge on the valve and turn the ignition on to see if the system pre-pressurizes to 45 psi or so. First suspect would be failing high pressure fuel pump followed by pressure regulator. Pumps go for $100 plus. Good luck.

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