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Car Forum / Jeep / October 20061999 JCS Engine Misfires in Reverse
Cylinder #1 floods when it's put in reverse. Hesitates occasionally in drive. ECM was replaced, same problem Any ideas? What engine? I would be looking for a harness that was too close to the exhaust or was really tight I think. When you put it in reverse, the engine moves which could cause a harness to hit the exhaust or be pulled on even, especially if you had a weak engine mount. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) > Cylinder #1 floods when it's put in reverse. Hesitates occasionally in > drive. > ECM was replaced, same problem > Any ideas? It's a 99 Jeep Cherokee Sport so probably the 4.0 Calr > What engine? > [quoted text clipped - 14 lines] >> ECM was replaced, same problem >> Any ideas? The engine is a 4.0 The mechanic that replaced the ECM, replaced the White/Blue wire from the socket to the injector back the the socket for the ECM and all is well so far. It's been two weeks and seems to work great. Thanks for your help. Phil Perhaps a leaking injector? You say it only leaks in reverse? > Cylinder #1 floods when it's put in reverse. Hesitates occasionally in > drive. > ECM was replaced, same problem > Any ideas? > Cylinder #1 floods when it's put in reverse. Hesitates occasionally in > drive. > ECM was replaced, same problem > Any ideas? The injectors have power applied all the time with the key on. The ECM controls the ground to the injectors. Follow the ground wire from the #1 injector back to the ECM. Wire should be White/ Dk Blue. Look for the wiring harness being pinched/chafed when vehicle is put into reverse. The ground wire is most likely being shorted to ground which causes the injector to stay open. |
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