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1996 Ford Ranger rough start

Tiny
JIM NIXON
  • MEMBER
  • 1996 FORD RANGER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 90,000 MILES
I replaced head gaskets last winter on my 4.0. Put new plugs and wiring on it. Only has 5000 miles since that. When it first starts up, it has a rough idle for about 30 seconds. I have replaced the throtle control sensor, and sprayed the throtle plates. Any idea? Thanks for the tranny info. JIM
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Friday, October 29th, 2010 AT 10:15 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine running rough or misfiring can be cause by the following:

1. Defective spark plug
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Manifold absolute pressure sensor
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Friday, October 29th, 2010 AT 6:20 PM
Tiny
JIM NIXON
  • MEMBER
  • 5 POSTS
I spoke to you a while back. 4.0 Ranger 1996, still running rough on start up ( for about 10 seconds) I have put new plugs, wires, idle control sensor, engine temp sensoe, intake air sensor. Any new ideas? JIM
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Tuesday, November 9th, 2010 AT 5:00 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try cleaning the MAF sensor with an electronic cleaner CRC and also the EGR valve and test throttle position sensor-
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Tuesday, November 9th, 2010 AT 8:49 PM

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