that_lowered_mj Posted April 7, 2016 Share Posted April 7, 2016 So I have an 88 comanche 4.0 5 speed with 137k. At idle it doesn't stay consistent. It will idle ok then drop off like it's gonna stall then jumps back up high for a little then drops back down to normal idle. It has new vacuum lines, plugs & wires, cap & rotor. Checked the fuel pressure and seems normal. Have any of you guys experenced the same issue and if so what was the cause and cure? Link to comment Share on other sites More sharing options...
Marine1Texas Posted April 7, 2016 Share Posted April 7, 2016 Make sure your bolts are tight on your manifold, a small leak can cause weird issues like this. I am sure more will chime in to give other things it could be. Link to comment Share on other sites More sharing options...
87Chief Posted April 7, 2016 Share Posted April 7, 2016 Like Kudo said, check your manifold bolts, this happened to me on my 87 2.5L and almost all the bolts were loose to the manifold and one was broken off, still haven't fixed it :hmm: Link to comment Share on other sites More sharing options...
cruiser54 Posted April 7, 2016 Share Posted April 7, 2016 Tips 1 through 5 at www.cruiser54.com first. Link to comment Share on other sites More sharing options...
MJanky Posted April 7, 2016 Share Posted April 7, 2016 Is it running rich by any chance? Link to comment Share on other sites More sharing options...
that_lowered_mj Posted April 7, 2016 Author Share Posted April 7, 2016 MJanky it doesn't seem to be. Bignuke and kudo I'll have to check them not sure if they are tight Cruiser54 bi**hin info man thanks for the site! Link to comment Share on other sites More sharing options...
cruiser54 Posted April 8, 2016 Share Posted April 8, 2016 Is it running rich by any chance? Could be. And it could be because Tips 1 through 5 haven't been done. Link to comment Share on other sites More sharing options...
cruiser54 Posted April 8, 2016 Share Posted April 8, 2016 MJanky it doesn't seem to be. Bignuke and kudo I'll have to check them not sure if they are tight Cruiser54 bi**hin info man thanks for the site! Go with the Tips and ignore any other suggestions at this point. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now