1996 Ford Ranger rough start

1996 FORD RANGER
90,000 MILES • 6 CYL • 4WD • AUTOMATIC
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JIM NIXON
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  • 5 POSTS
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
Oct 29, 2010 at 10:15 AM
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RASMATAZ
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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
Oct 29, 2010 at 6:20 PM
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JIM NIXON
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  • 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
Nov 9, 2010 at 5:00 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Try cleaning the MAF sensor with an electronic cleaner CRC and also the EGR valve and test throttle position sensor-
Nov 9, 2010 at 8:49 PM
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