Ford Forum - Enthusiast Forums for Ford Owners - View Profile: greasemark

greasemark greasemark is offline

Senior Member

About Me

  • About greasemark
    Always been a Ford person..
    Colorado, near Denver
    This is one, music is the other
    Mechanic (Ford dealer)


Total Posts
Visitor Messages
General Information
  • Last Activity: 02-11-2018 06:50 PM
  • Join Date: 05-14-2011
  • Referrals: 2


Showing Friends 1 to 2 of 2

Visitor Messages

Showing Visitor Messages 1 to 2 of 2
  1. 01-15-2013 11:34 PM - permalink
    Hello Mark, I'm new to this site & see you have a wealth of knowledge.
    Automatic 1998 Ford F150 4.2
    I'm having issues with my truck & had 4 mechanics look at it can cannot figure it out. Engine light comes on, speed decreases, OD light flashes & turns off when truck turned off & restarted. Code shows P0720 & I've replaced the OSS, ISS & ABS sensors, cleared diagnostics codes & not change. All wiring was checked & no problems there. I went 1 wk with no problems & then back to doing the same thing. I took it back to the mecanic who rebuilt the trans and he could not find anything. I took it to another mechanic & he said he corrected some mixed up wires. The truck worked for a couple days and went back to having issues. I wonder if he cleared the diag codes to buy some time. I took it back to this mechanic & he replaced the computer which worked for 4 days. I appreciate any suggestions you are able to give. Thank you, Miguel
  2. 03-04-2012 10:40 AM - permalink
    On the 2001 Expl. The cel is on and the code is P0171. The O2 sensor. I suspect. But to give a full view. I changed the air filter, it looked like a birds nest, really it did, and took off the IAC and there was part of the bird's nest on one side. Cleaned that and put it back. Cleaned the throttle body intake, made sure the butterfly was not sticking. So this is what happens. I start the vehicle and it revs to 1500 and I wait for it to settle, about five mins. put into gear and off we go, slowly because it has no pick up, after about ten miles or twenty minutes the throttle will stick and stay at sometimes 1100 or drop to 750, but it stays stuck. And as I start from a stop if I press on the accel. it howls but doen't accel. and at this point it begins to overheat. And then it starts to back flush the fluid into the overfill/res.. So I'm just thinking that it's not exhausting all the gasess. The engine runs good and produces power.

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