Why will car not start after replacing engine


Asked by May 28, 2014 at 12:56 PM about the 2001 Mazda Tribute ES V6 4WD

Question type: Maintenance & Repair

Put another motor in and now it will not start, turns over, just won't start without a good bit of help.  Have to turn the switch back and forth several times and have someone under the hood press the throttle, all while hooked up to a jump box, battery is good, starter is good and car runs good after it does start, but can't just turn the key and start it.

8 Answers


sounds like a fuel issue to me.


checked fuel pump and all lines

Exhaust converter block it happened with me


Has one practically brand new and no codes. Replaced thermostat, and seemed to help a lot, now when it starts it runs really rough. 2 of the cylinders aren't working, tried switching coil packs, same 2 cylinders not firing. Any ideas on what could cause the cylinders to not fire, spark plugs are new.

Check all coil first and make sure first that coils are working


Sorry I didn't make it clear, already checked them, It's not the coils

1 of 1 people found this helpful.

If know spark pluge good coils spark good.still 2 cylinder not working ?plz do compression test it's easy each cylinder check is it compression is good?

check engine to firewall grounding strap

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