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Ok so here I go again on this 90 Jeep…..straight 6cyl 2wd…drove home frm work and wouldnt start next day…..had corrosion on battery so replaced bad cable head and chg battery…started and ran fine. next day dead again…now wont even start with new battery or jump….pulled wire from coil and engine actually turned….was going to do tune up anyway so, replaced plugs, wires, cap and rotor, coil and pcv…same again…………acts same/////there is a small rail with 4 relays and a small metal box above the coil and I hear a cick when turn key……Im really reachin for anything at this point :blink:
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Is this a stick tranny? I had a crank sensor go on one of these the sensor is by the bell housing ,if it cant read the engine turning it wont send fire to the coil.
Ok update. .. starter and battery replaced. . Now will turn over but not fire. Checked fuel pump.when I bypassed ignition it will work and jeep will run. Now, where do I look? Relay or fuse link or ecm….aaaaaaaaaa. Tired of throwing money at it..
Any ideas?don’t be to quick to blame the ecu as most times it turns out to be something more simple ? i would start at the ignition switch then follow wiring diagrams to fuses then relays ? i doubt it would be immobilizer as it would not run at all if that was the case ? you need to find the fuel pump relay remove it and see if it switches when the ignition is cycled. their should be high power side and a low power side if you remove the relay and check with a multimeter you should have 1 positive terminal and 3 negative when ignition is cycled to the on position you should have 2 positive terminals but bare in mind when switched to run position (not crank)the first initial switch cycle will only become live for 3 seconds or so on the lower power side. do this then let me know what results you get ?
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