jamonroe75 Posted November 25, 2011 Posted November 25, 2011 I have an 86 comanche with the 2.5 4 cylinder. It runs for about a mile then dies, but starts right back up. I have replaced the Fuel Filter and check the gas cap vent. it still does it. fuel lines from tank are ok. It is getting gas all the way to the carb. i can't think of what the problem might be. any suggestions. :???: :dunno: :???: :dunno: :???: :dunno:
cruiser54 Posted November 25, 2011 Posted November 25, 2011 Carb? You should have throttle body fuel injection.
HOrnbrod Posted November 26, 2011 Posted November 26, 2011 The 1986 2.5 engine could be either EFI or carb. Sounds like bad fuel is a possibility. Had it been sitting long? Was it running fine until you bought gas? If none of the above I'd find a kit and clean/rebuild the carb.
jamonroe75 Posted November 26, 2011 Author Posted November 26, 2011 you are right. it has a throttle body. can any one offer any help to the problem. I also forgot to mention this. when cranking it revs up high, then idles fine, everytime. even after dying, and restarting. :dunno: :???: :dunno:
cruiser54 Posted November 26, 2011 Posted November 26, 2011 I'm not as savvy on the throttle body 4 cylinder injection systems as I am on the 4.0s, but here are a few things I would check. CPS output. Fuel pump relay. TPS. And make darn sure that braided strap from the back of the head to the firewall is in good shape. Be sure to remove it from the firewall end, scrape the paint off the attaching point on the firewall, clean the eyelet and reinstall.
jamonroe75 Posted November 29, 2011 Author Posted November 29, 2011 I am planning on cleaning the throttle body. i have seen several threads the said to use O2 sensor safe throttle body cleaner. Is Sea Foam Deep Creep O2 sensor safe.
cruiser54 Posted November 29, 2011 Posted November 29, 2011 Do not forget that ground strap on the firewall to the head. It's a weak point and much of your fuel injection system relies on it for a ground path. Me, I would replace it with a ground cable. But, you need to do as an absolute minumum: Remove each end, clean it's mounting point til shiny, clean the terminals and reinstall. You must scrape the paint off the firewall mounting point.
jamonroe75 Posted November 30, 2011 Author Posted November 30, 2011 I am planning on cleaning the throttle body. i have seen several threads the said to use O2 sensor safe throttle body cleaner. Is Sea Foam Deep Creep O2 sensor safe? Can Someone answer this?
jamonroe75 Posted December 11, 2011 Author Posted December 11, 2011 It turn out to be a combination of O2 sensor and fuel pump. Thanks for the the help
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