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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

302 missing under low rpm pull

 
  #31  
Old 01-16-2013, 07:37 PM
smilingole
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My solution

I searched this forum high and low looking for an answer. I had all the same symptoms as this one... replaced the wires, plugs, rotor, egr valve, fuel pressure regulator etc. Long story, the fix was spark plug wires. Even though they were new, they were arching. Replaced the wires a second time, those were bad. Replaced them a third time with MSD 8.5, problem solved.
 
  #32  
Old 10-23-2018, 05:20 PM
RMS 1911
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Same here but

Have a 95 f-150 truck doing the same thing skipping, hesitation and some occasional mild back fire but it runs fine with the mass air sensor unplugged other than initial throttle, so what other sensor could be malfunctioning?
the ignition control module is good checked it with a known good one. Like I said it runs fine power and acceleration wise with it unplugged other than hesitation at moving from a dead stop but not rolling.
The mass air sensor isn't the problem either nor is it a leaky gasket/hose. Its not the distributor bushing so it has to be a sensor or the computer.
it also clears up and runs fine as it is supposed to then acts up sometimes with a cel I pulled codes 10 , 15 , 111 out of it.
Any thoughts?
 

Last edited by RMS 1911; 10-24-2018 at 08:37 AM. Reason: Clarification
  #33  
Old 10-23-2018, 06:10 PM
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My 95 F150 302 was doing the same thing, replaced plugs, wires, coil,temp sensors to no avail,checked injectors and found four bad ones,replaced all and runs better than it has in years.
 
  #34  
Old 11-07-2018, 09:45 PM
RMS 1911
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Found it

Originally Posted by RMS 1911 View Post
Have a 95 f-150 truck doing the same thing skipping, hesitation and some occasional mild back fire but it runs fine with the mass air sensor unplugged other than initial throttle, so what other sensor could be malfunctioning?
the ignition control module is good checked it with a known good one. Like I said it runs fine power and acceleration wise with it unplugged other than hesitation at moving from a dead stop but not rolling.
The mass air sensor isn't the problem either nor is it a leaky gasket/hose. Its not the distributor bushing so it has to be a sensor or the computer.
it also clears up and runs fine as it is supposed to then acts up sometimes with a cel I pulled codes 10 , 15 , 111 out of it.
Any thoughts?
Update it was the O2 sensor but no code with it.
 
 
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