Aaron3078 Posted March 29, 2020 Share Posted March 29, 2020 87 comanche 4.0l. New to this so please bear with me.washed engine to change valve cover gasket, I had unplugged battery and let set more than 24 hrs. Tried to crank and started getting backfire that blowed out map sensor vacuum line from back of T.Body. It has spark and is getting fuel, was driving it before replacing gasket, replaced CPS, can't find any info on why it blows vacuum line, it will not try to run only blowback, please help Link to comment Share on other sites More sharing options...
Ωhm Posted March 29, 2020 Share Posted March 29, 2020 Welcome to the forum. Upper right hand of screen. Click on Username. Click on Account Settings. Find and click on Signature. Add vehicle info here (YR ENG TRANS etc etc) and save. This helps everyone. Information will be available every time you post. Link to comment Share on other sites More sharing options...
Ωhm Posted March 29, 2020 Share Posted March 29, 2020 Backfire make me think of water in the distributor cap (crossfire). Link to comment Share on other sites More sharing options...
Warren Mohler Posted March 29, 2020 Share Posted March 29, 2020 Washed mine down last fall and it did the same thing Link to comment Share on other sites More sharing options...
Aaron3078 Posted March 30, 2020 Author Share Posted March 30, 2020 Thank you that's exactly what it was Link to comment Share on other sites More sharing options...
macbon Posted March 31, 2020 Share Posted March 31, 2020 Check for broken parts in the distributor. Link to comment Share on other sites More sharing options...
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