Running rough and will not pull up a hill in 3rd gear stalling

Tiny
CARLGME
  • MEMBER
  • 1992 FORD RANGER
  • 230,650 MILES
While driving a few days ago the truck started running rough and stalled a time or two and it would hardley make a very small grade hill in front of my house it read a few pages and found to check the coil packs and I found that it only fireing on 2 cylindders # 1&4 and 2 & 3 did nit have any spark from the wires I switched the cooi;s pack front to back and back to from nothing changed I had the imc checked at advance they said it was good since it had such high mileage I replaced the crankshaft sensor and still I have the same problem. Could the pcm or imc be bad and if so how can I check to find out which one is bad.L. Also thereis NO check engine light on.
Friday, September 16th, 2011 AT 3:36 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
I'm surprised there is no check engine light. That makes me question the PCM. Check the wiring to the coils to see if there is damage, an open circuit, corrosion. That would prevent power to the coils.
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Friday, September 16th, 2011 AT 3:50 AM

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