idles bad until engine warms up

Discussion in '1983 - 1988 Ford Ranger' started by teemgreen99, Aug 26, 2011.

  1. teemgreen99

    teemgreen99 New Member

    I have a 1987 ford ranger 2.3 gas 5 speed manual and the idle fluctuates when I first turn it on until engine is warm even to the point that it will die sometimes, the idle goes high low steadily until it dies or warms up then it runs just fine. Any ideas I replaced the IAC and changed some vacuum lines off the map sensor that looked cracked and warn also replaced the pcv valve.
  2. Ranger Forum Sign Up!

    Join Today - It's Totally Free!

    Are you a Ford Ranger fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford Ranger Fans to meet online.
    Once you join you'll be able to post messages, upload pictures of your Ford, and have a great time with other Ranger fans. Whether your an old timer or just bought your Ford you'll find that Ranger Forum is a great community to join. Best of all it's totally free!

    Join Today! JOIN FOR FREE

  3. Hurley

    Hurley Superultramegalurker

    Check engine light on?
  4. OP

    teemgreen99 New Member

    no check engine light, only thing i could think of is the Map sensor
  5. Hurley

    Hurley Superultramegalurker

    Might be your egr valve
  6. C Denny Run*

    C Denny Run* New Member

    I'm positive it has something to do with vacuum. Have you used brake clean, or anything to check for leaks? I had the same problem with my 2.9, and it turned out to be a vacuum clog. Clogs can give the same symptoms as a leak. I had to take my whole intake system apart, and do a super clean. Fixed it right up:thumbsup:


  7. C Denny Run*

    C Denny Run* New Member

    Oh, and by the way, the check engine light doesn't have to be on, for it to throw a code. It could have a code stored in it. Sometimes the CEL flashed briefly, and you don't even see it. Also, it could have a burned out bulb. When you first turn your key forward, does the CEL flash? That's one way to tell.

    I didn't have a CEL on, but I had three friggen codes stored! Might want to check anyway. I bought a OBD1 code reader off ebay, for like $15 (new) Totally worth it!

Share This Page