Intermittent hesitation and backfire through the intake

Tiny
CRAIG TAYLOR
  • MEMBER
  • 1998 JEEP WRANGLER
  • 2.5L
  • 4 CYL
  • 4WD
  • MANUAL
  • 150,000 MILES
I have been having issues with hesitation and backfiring through the intake from 1500 rpm through 2000 rpm's after that it runs fine. I have replaced the ECU, TPS, MAP sensor, intake temperature sensor and both o2 sensors. Problem still there. ECU was programmed to my VIN number from flagship 1 out of New York. It is not a constant problem. Intermittent.
Monday, March 19th, 2018 AT 3:36 PM

1 Reply

Tiny
HARRY P
  • MECHANIC
  • 2,292 POSTS
Have you ever done a tune up on it? If not, then do it. At 150,000, it needs to be done anyways. A bad plug wire or two could cause that intermittent backfiring (I have seen it). Also, is the service engine light on? If so, what are the code numbers?
Was this
answer
helpful?
Yes
No
+1
Tuesday, March 20th, 2018 AT 4:35 AM

Please login or register to post a reply.

Sponsored links