back fire in intake coming from # 5 cant fix

jdhcolrado · May 23, 2016

have a 1994 ram 1500 318 5 spd 4x4. has a back fire in the intake if i unplug # 5 injector it goes away. then i just have a dead cyl. I have replaced the tps, aiv, the pick up in the distributor new cap, rotor, wires. compression on #5 is 125 and when i put a timing light on the crank shaft pulley is on except i has a several inch jump seem to correspond with # 5. any ideas
thanks.

B-Shot · May 23, 2016

Wiped cam lobe on exhaust side on #5 is what it sound like to me

Rustycowl69 · May 23, 2016

B-Shot said:
Wiped cam lobe on exhaust side on #5 is what it sound like to me

that would be easy to confirm by just pulling the left v. cover, and measuring/watching lift of pushrod.

jdhcolrado · May 23, 2016

wiped cam lobe will that show on compression test ?. and would that make my timing mark jump why up.

jdhcolrado · May 24, 2016

wiped cam lobe will that show on compression test ?. and would that make my timing mark jump why up.

B-Shot · May 24, 2016

Timing mark jumping because the exhaust valve is not opening like it needs to so exhaust gas is coming out of the intake valve as it starts to open. Broke rocker will do the same thing. Pull the valve cover and inspect

back fire in intake coming from # 5 cant fix

jdhcolrado

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B-Shot

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Rustycowl69

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jdhcolrado

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