Tune up gone wrong!

[hemi_fan]

So I decided to bite the bullet and give the winter beater a tune-up... now I wish I hadn't because it won't stay running. I replaced the plugs, PCV, Air Filter, and Fuel Filter.

The old fuel filter was quite rusty and stuck in the line pretty good but I eventually got it off. Now when I fire it up it won't stay running unless I give it half-throttle or more. It doesn't seem to be misfiring when it is running which led me to believe its not getting enough fuel.

I checked to make sure I didn't put the filter in backwards, and also removed all the plugs to see if I broke any, and checked that the plug wires were seated. I installed them one by one so the wires aren't mixed up. I also put the old PCV back in to see if anything changed but it didn't. And I checked for intake leaks but found none.

Any ideas? Is it possible that the fuel line got a clog or kink in it? And if so, can I blow some air through the bleeder to try to back-flush it out of the line?

This is for a 1993 Mercury Grand Marquis BTW.

I think these cars have a return-style fuel system so if it were clogged it wouldn't rev up at all, am I correct in saying this?

 

[hotrodredneck]

you have a vac leak somewhere. Probably a little hose that you forgot to hook up or maybe you left the IAT (intake Air Temp) sensor disconnected. Double checl all your vac lines and elect connectors

 

[hemi_fan]

you have a vac leak somewhere. Probably a little hose that you forgot to hook up or maybe you left the IAT (intake Air Temp) sensor disconnected. Double checl all your vac lines and elect connectors

Found it. It was the one going to the back of the lower intake so I couldn't see that it was off. Thanks.

 

[AUTOBAHN]

you have a vac leak somewhere. Probably a little hose that you forgot to hook up or maybe you left the IAT (intake Air Temp) sensor disconnected. Double checl all your vac lines and elect connectors

Good advice Hotrodredneck!!!

Wish you were still on Mighty .

Mike