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Check Engine light in conjunction with transmission shifting sparatically

Tiny
JBITELY
  • MEMBER
  • 1993 FORD BRONCO
  • 5.8L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
The thing seems to do this worse when it is really cold outside but it will start and drive then at low speeds predominantly the check engine light will come on and the transmission will shift up or down UN-neccessarily and continue doing so untill I gas on it? Very strange I suspect it to be ECM issues but the air temp making it worse makes me think otherwise. Input please! It is the E4AOD trans.
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Thursday, January 23rd, 2014 AT 10:40 PM

4 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fluid and scan for codes first
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Friday, January 24th, 2014 AT 6:53 AM
Tiny
JBITELY
  • MEMBER
  • 3 POSTS
Ok so I scaned for codes and had egr flo insufficient so I checked that out and found a broke off vaccum line so I replaced it. Drove it to work that afternoon did excellent no check engine light or anything but when I got off at 5am it started cutting out and almost dying at times then began backfiring when I tried to floorboard it. When it would cut out the check engine light would flicker ad well as the right turn signal indicator? Help please!
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Sunday, January 26th, 2014 AT 8:50 PM
Tiny
JBITELY
  • MEMBER
  • 3 POSTS
Also the transmission fluid level is good
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Sunday, January 26th, 2014 AT 8:55 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Rescan it and check feul pressure with a gauge auto parts rent them. If trans still screwing up have a trans guy look at it.
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Monday, January 27th, 2014 AT 6:15 AM

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