cranks over but wont fire it is blowing back through the intake?

1999 JEEP GRAND CHEROKEE

101,000 MILES

ANONYMOUS

MEMBER
1 POST
FOLLOW

i have a jeep with a 4.0 that i just installed a used motor in that i got from a yard...the jeep ran when the pulled the motor bot the stripped everything off the motor...so we ended up moving all the parts over...we installed the motor ..she cranks over but wont fire it is blowing back through the intake...we reset the NOT distributor like 8 times still no go...will a bad ground cause it not to fire...or can the flywheel be installed wrong and make it fire wrong...lost and have no clue on the problem

Dec 26, 2012 at 3:01 PM

BORIS K

CAR REPAIR CONTRIBUTOR
836 POSTS

Hello,

Please check the distributor installation again.
Ensure that cylinder 1 is on TDC, that is Top Dead Centre.
Remove the distributor and remove the rotor and camshaft position sensor
Align the hole in the plate with the hole in the distributor housing.
Lock the shaft in this position .
Ensure that the oil pump drive is lined up at 11-5 o'clock, see below image.

See below link on how to time the distributor correctly.

https://youtu.be/xRHW0i3V6qM

Once the distributor is installed correctly please ensure that the firing order on the distributor cap is correct. See image below.

Please let us know how you get along.

Cheers, Boris

Images (Click to enlarge)

Aug 5, 2021 at 3:45 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.