Question about 1989 Ford F 150

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Have 1989 f150 ford that will not start cold unless I use starting fluid, but will start when warm. Replaced IAC sensor and TPS sensor but the same skip and runs rich

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Posted on Jan 02, 2017

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Both appear to be a lean mixture problem according to my research. Have you run some injector cleaner through it by any chance? What about coolant level, is it staying up, pressure tested, just in case coolant is mixing with fuel via, head or intake gasket leak, and leaning out the mixture. Low fuel pressure will cause lean mixture in some cases, test it or at least change filter if not done recently, or both. Hope that helps.

Posted on Dec 12, 2008

  • 448 Answers

SOURCE: do you adjust the tps sensor on a 94 ford f250 5.8l when replaced

Best thing to do with a vehicle that you don't have any idea where the timing is supposed to be is something I discovered when I was a mobile mechanic. Loosen the distributor a little. Block the front tires and maybe even place the front bumper against something solid like a building. Put the truck in drive and hold the brakes down.Preferably have someone else do it while you are under the hood. slowly start raing engine speed. When it starts to stumble, move the distributor just a little one way or the other till it runs better. Once it does clears up, put a little more throttle to it. See if it keeps up. It may get to a point your back wheels will want to burn rubber. Once it does, let of the gas fast. If it dies, you have problems. Then you'll do what I said in the beginning and take it to your dealer to plug into it. Dealer, parts house, whatever. If it stay running good. You may have found the timing point. Good luck. If this is helpful, please post as such. If it is a know.TY

Posted on Jan 29, 2009

  • 295 Answers

SOURCE: 1989 ford f150 w/ 5.0 liter..... engine light on

I would check the oil pressure of the engine. The reason is the timing chain tensioners are run with oil pressrue. I think your timing chain tensioners are leaking down when engine is getting to operating tempature . The oil is thinning down as warms up , as it should to lubercate . I would check compression and do a cylinder leak down test on all the cylinders. Then if the compression is good and the cylinder leak down is good. I would change all the timing components, ( chain, timing gears, timing chain tensioners )

Good Luck , I hope this helps.

Posted on Apr 18, 2009

SOURCE: Engine surges then stalls after a re=start

Check the variable timing sprockes on the camshafts, they come with wimpy rivets to hold them if they break the car runs like it have bad spark plugs of timing is wrong.

Posted on Jul 16, 2009

  • 75817 Answers

SOURCE: 1988 Ford F150 running rich, can't pass emissions.

has the cat been replaced? worn out cats cause high HC emissions

Posted on Aug 09, 2009

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