1985 F-150 was dying going DOWNhill only, now it will not start
So a couple of days ago I got a 1985 F-150 for free. It had been sitting for about a year. It is a 302 EFI, Auto, 2wd. At first it stalled everywhere, driving around town, sitting in park, etc. So I cleaned the EGR valve, the IAC valve, the throttle body and replaced the O2 sensor. Voila, it passed smog, barely. Raw gas was AT the allowed limit. Since, I have replaced the fuel filter (on the frame rail), distributor cap, and rotor. I have blue spark to the plugs so I don't believe that is the issue. While the typical suggestions are welcome there is one thing that I believe sets this apart from the normal ''won't start'' threads. After it was smogged it drove fine, around town, idling in the driveway, it was all good. Except when going DOWNhill. I drove it around town on level roads for about an hour, then I drove up hill for afew minutes, all good and running strong. After a couple minutes going downhill it died. Now it will not start a whole day later. It turns over all day, just will not catch and run. It did this before smog as well but always started after sitting for a few minutes. Help please. I'm out of ideas and I would like to keep from spending more money pointlessly. Thank you in advance for any help/insight you can give.
Cars & Trucks - Ford - F-150 - 1985 Ford F150
Answers & Comments
No you can't you need a scaner.
tkae out one spark plug, dissable your spark system turn over your car 3 cranks max. if you smeel fule then that's not your problem. also take a look at your rotor on your distribuitor is it out of line ? take it out and inspect it it may have jumped of a poaint if the small plastic alingment guid is broken off.
i had a friend with a GMC typhoon that has this same problem and all he need has a new rotor for his distrib.....
also inspect your work for leaks around the lines.
o ya for sure, it's always grate to find out what works and what dosn't. well best you can do is give me a good rating or what not. but i'm just here to help. give a me amessage if you need any more help.
When I was a kid I was told a story about an older car that had a lot of rust in the gas tank. The man said when he would stop harder than normal the rust in the gas tank would flow to the front and cover the fuel pump hose.
Not sure this applies but I know older F150s are notorious for gas tanks that rust out.