1987 Mercury Marquis car stalls up or down hills

1987 MERCURY MARQUIS
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RICK46342
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Engine Performance problem
1987 Mercury Marquis 86632 miles

This car stalls going up or down a hill, but seems to run good at other times. Have changed alot of things, What do you think it could be. We need help.Thanks
Mar 9, 2009 at 5:34 PM
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BMRFIXIT
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Hi Rick need more info to be able to help you here
does it stall while driving it just dies on you
or stall when stopped ?
does it start up right away ?
lets start by checking it for tune up
and check idle air control valve
let me know
Mar 9, 2009 at 6:39 PM
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RICK46342
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It has had a tune up, plugs, wires for plugs, cleaned injectors, replaced alternator, battery, ignition coil. It stalls going upor down hills and starts right back up. Idles kind of rough sometimes to. It's my Daughter's car. Thanks
Mar 9, 2009 at 6:53 PM
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BMRFIXIT
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I would suggest doing a fuel pressure and volume test
Mar 9, 2009 at 8:11 PM
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RICK46342
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Thanks, But my son in Law did that and also took the gas tank out and cleaned it to make sure nothing was blocking the fuel. He has followed the repair guide and still has this problem.

Thanks Rick
Mar 9, 2009 at 9:07 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.