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Diagnostic symptoms: hoses leaking vs fuel pressure problem 700 1995

posted by  Philip on  Sun Jun 19 01:34 CST 2005
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last visit: Thu Oct 23 10:21 CST 2014
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My daughter's 95 940 Turbo has a bad stumble/surge problem. It went away after 200 mile highway trip, but now over five days has become gradually worse again. Any kind of load and it starts bucking. I have to give extremely light pedal pressure to get up to speed.

I have:
replaced fuel filter
filled up tank with gas
put in big bottle of Techron
replaced fuel pump relay
re-soldered FI relay
swapped out FPR
Swapped out AMM
replaced small vacuum hoses that looked crumbly
inspected big turbo hoses
swapped coil

Before I build the tool to pressurize the turbo hoses as described in the FAQ or buy a fuel pressure tester, is there a way of determining if there is a air system leak vs low fuel pressure? That is, if there is a air pressure or vacuum leak will it be running rich, so that I could check the plugs for fouling, the exhaust pipe for soot, and the exhust for black smoke? If it shows these symptoms, should I build the tool to look for air sytem leaks? If not, then buy the fuel system tester?





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New Diagnostic symptoms: hoses leaking vs fuel pressure problem [700][1995]
posted by  Philip  on Sun Jun 19 01:34 CST 2005 >


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