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Ford F-150, Ford F-250, Ford F-350, Engine, Truck
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#183 of 252 Re: 1997 Gas Ford F-150 Creamy Oil Cap? [kimberly1986]
Jan 26, 2010 (6:17 pm)
If the oil is creamy or yellow and the oil level goes up usually thats when there would be a blown headgasket, or like you guys said before a cracked head, or waterjacket would do this also.
When you checked the oil was the level above full, and were you low on anti-freeze? That will tell you if the headgasket blew. That happened to my brothers jeep, he replaced the gasket and his levels are good and the yellow is gone in the valvecover.
I hope this will help?
#184 of 252 91 f-150 4.9 engine problems
Jan 27, 2010 (1:02 am)
91 f150, 4.9 I6 w/5 sp -187000 mi.. over all truck runs good for age and milage.BUT! when truck is allowed to warm up a while you go to drive it and after 5 mi. or so it will start to miss/bog down like its dropping spark or losing fuel. if it stalls it will not restart right away. and it doesnt always do this either. usually a couple days in between. the first time this occured i opened the hood and found the ps pump cap loose and it had sprayed some fluid on the coil and its connecter clip. a few dayes later i put new plugs cap rotor. made no difference but i did notice the distributer was extremly loose and was out of time. i reset by ear which corrected the loss of power ive had ever since ive owned the truck but has had zero impact on the running crappy and stalling issue the local shops wont touch it cause they say it has to be not running for them to find the problem but when it dies by the time i get it in town to the shop it will restart on its own. Any advice on this matter would be greatly appriated
#185 of 252 Re: 91 f-150 4.9 engine problems [raspy]
Jan 27, 2010 (1:43 am)
find another shop. check for vapor lock. but it really sounds like you need a complete tune-up. Alex
#186 of 252 Re: 91 f-150 4.9 engine problems [raspy]
Jan 27, 2010 (7:55 am)
Sounds exactly like my 1991 2 1/2 years ago. I found it to be the wire connectors that attach to the fuel tank. I finally cut a hole in the bed of the truck (as an access hole for future problems) marked the color code on the fuel tank. Cut the slip on connectors off of the wires and re-connected them using wire Kern's (available at any hardware store or electrical supply store). Mine of course is a single tank (rear), if you have duel tanks and this problem is on either tank it may be another problem.While you are checking out the truck, check the condition of the vacuum hose running from intake plenum to the return control valve (fuel return control valve). If it is cracked or anything, replace it. Please let me know what you find in the end. Just enter here your findings and it will automatically come to me. Mike
#187 of 252 Re: 91 f-150 4.9 engine problems [raspy]
Jan 27, 2010 (2:07 pm)
I had the same prob on my 91 ford, 302 motor. There is a secondary inginition module on the side of the distributor, or it is on the side of the fender well where the fuse box is. Check your repair manual to locate it. If it is on the dist. you will have to pull the dist to change it . BE SURE to mark the timing brfore you take anything loose. The same thing happened to me, after its runs a while the thing will skip and eventually die , and will not crank, but after bout 30 min the thing would fire and run fine for a while and then the cycle would start back. Im pretty sure it is not the fuel pump, if it was it would run crappy all the time. The ingnition module is only bout $20, and easy to change. Thats where i would start. Fuel pump is a pain in the ass to change, and its bout $90.
#188 of 252 Re: 91 f-150 4.9 engine problems [raspy]
Jan 27, 2010 (2:09 pm)
When you changed the plugs did you put new wires on. If not make sure the truck starts and runs normal before you do this. Take water (hose or spray bottle) and spray the wires while the trucks running and if it starts to miss an acts up that maybe the reason for the engine missing. It's a simple start! Zack
#189 of 252 Re: 91 f-150 4.9 engine problems [mike4578]
Jan 27, 2010 (5:52 pm)
thanks for info but when mine dies it will still crank it just wont hit, the funny thing is according to the last owner the rear tank leaked and the front tank had a bad pump so he said he put the entire unit from the rear tank into the front tank and removed the rear tank all together witch definately makes the fuel gage way off and the dash switch was pushed into the dash so it could not be used but these actions were done over a year ago, so i dont see why they would have an impact now
#190 of 252 Re: 91 f-150 4.9 engine problems [raspy]
Jan 27, 2010 (8:15 pm)
When the truck dies is there any spark, the coil maybe going bad?
#191 of 252 Re: 91 f-150 4.9 engine problems [mike9408]
Jan 28, 2010 (9:07 pm)
thanks buddy for the input, resolved the problem today. it died on me again today. and boy does it have spark, ye haw. it did turn out to be the fuel pump itself. Aparently the pump would overheat and shut off and then cool down enough to restart after five minutes. and it is also the factory original pump from the rear tank. 187000 on it. and thanks to everyone else who gave their opinions and advice it was very helpful. i will be passing on this site to people i know with positive marks!
#192 of 252 Re: 2001 F150 5.4, idles low or shuts off? [notlob]
Jan 31, 2010 (7:36 pm)
We changed the IAC (idle air control), it must of stuck open when the truck was hot that,s why when it warmed up it ran fine.