85 302 EFI stalling & valve clatter/chatter
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85 302 EFI stalling & valve clatter/chatter
Will pull codes & clean IAC tonight but wanted to check to see if anybody might have a clue because the valve clatter was something I was not expecting. On a 100 mile trip yesterday, 2 seperate times I came to a stop and the truck stalled, shoved it into neutral and started it right up, had to give it quite a bit of gas to keep it running and the valves where clattering. After about 5-10 seconds everything was fine, went through 10 or so more stops without any hesitation and then it happened one more time. Do these trucks have a timing sensor could that be causing the problem? I have read the other posts about the EGR valve/sensor will also check that. Valve Clatter/chatter is what I am curious about, could it be lack of fuel?
1985 -- 302 EFI F-150 2wd 105,000 miles.
Any thoughts?
HH
1985 -- 302 EFI F-150 2wd 105,000 miles.
Any thoughts?
HH
Hotshot
Joined: Jul 2002
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From: Bend,OR
codes should help some. when was it tuned up last? I would check your timing as well. and how about your oil pressure? if your trusting the stock ford gauge that is a problem because they suck. I suggest getting a real mechanical gauge so you know what the pressure really is. did you fuel up resently at a different gas station?
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Good questions
Good questions..
I am tracking to see if the same condition happens on both fuel tanks. It has been tuned up with excellent oil pressure, runs very smooth otherwise. Usually only drive the truck on the weekends.
maybe tonight I can get the codes pulled.
Tks.
HH
I am tracking to see if the same condition happens on both fuel tanks. It has been tuned up with excellent oil pressure, runs very smooth otherwise. Usually only drive the truck on the weekends.
maybe tonight I can get the codes pulled.
Tks.
HH
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Dealer diag-- still no resolution
I Pulled the codes, nothing showed up. took it to the dealer and after a couple of hours (Very nice- they did not charge me anything) they could not isolate the problem because it never occured while they were testing it...?? Based on previous experience they would suggest replacing the fuel pumps both the low pressure and High pressure rail pump. Truck has 105,000 miles all original fuel parts.
note: Driving over to the dealer the problem happend again. Took me about 3 minutes this time to keep it running (until it smoothed out) required me to restart it a dozen+ times before running smooth. To me it sounds like a very out-of-time car or lack of fuel. (maybe they are right about fuel pump). Still trying to isolate it to one of the tanks.
note: they could not check the fuel pump pressure because that year model for some reason did not have a port for checking and none of the mechanics had test equipment which they could easily put inline to test the pressures.
Any other thoughts?
HH
note: Driving over to the dealer the problem happend again. Took me about 3 minutes this time to keep it running (until it smoothed out) required me to restart it a dozen+ times before running smooth. To me it sounds like a very out-of-time car or lack of fuel. (maybe they are right about fuel pump). Still trying to isolate it to one of the tanks.
note: they could not check the fuel pump pressure because that year model for some reason did not have a port for checking and none of the mechanics had test equipment which they could easily put inline to test the pressures.
Any other thoughts?
HH
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From: Eglin AFB
i dont know if your truck has one, but the same thing happened to a friend and he repalced his pumps, and regualtor and allt aht good stuff, and it ended up being a crank position sensor but being your truck is an 85 i dont think it has one.
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any other ideas?
Anybody have any other ideas? here is the latest.
Yesterday was a scary moment, failed at highway speed middle of the freeway. Was going 65 then all of a sudden lost power. When it did fire black smoke came out of the exaust. Tried to start it and it would fire and would run like it out of time (thus the sound of rod clatter etc.). After about 5 minutes was able to get it refired and it ran smooth for another mile then same problem all over again. Happened about 5 times yesterday, today it running smooth again.
After taking it to two shops one thinks is fuel related (but this year 85 302 does not have an easy place to check fuel pressure) and the other thinks it spark (electronic ignition module) but cannot isolsate the problem because it never occurs at the shop arrggg. Have replaced the fuel filter and the low pressure fuel pump in the tank (reason for this is because before it seemed to only happen on the rear tank.. as of yesterday that is not true any more...).
Replaced wires, cap, rotor...
So, next part to replace? Electronic module, high pressure fuel pump or what?
thanks
Howard
Yesterday was a scary moment, failed at highway speed middle of the freeway. Was going 65 then all of a sudden lost power. When it did fire black smoke came out of the exaust. Tried to start it and it would fire and would run like it out of time (thus the sound of rod clatter etc.). After about 5 minutes was able to get it refired and it ran smooth for another mile then same problem all over again. Happened about 5 times yesterday, today it running smooth again.
After taking it to two shops one thinks is fuel related (but this year 85 302 does not have an easy place to check fuel pressure) and the other thinks it spark (electronic ignition module) but cannot isolsate the problem because it never occurs at the shop arrggg. Have replaced the fuel filter and the low pressure fuel pump in the tank (reason for this is because before it seemed to only happen on the rear tank.. as of yesterday that is not true any more...).
Replaced wires, cap, rotor...
So, next part to replace? Electronic module, high pressure fuel pump or what?
thanks
Howard
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Joined: Nov 2005
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From: Murfreesboro, Tennessee
It sounds alot like what happened to a nissan I had. It would be fine and good but once it ran for a little while it would randomly die and it took forever to start again and it would back fire some. It turned out the coil was bad. I asked for the bad part and cracked it open and it had a open gap on the contact. Nothing to crazy but I was messing around and warmed it up and the gap got bigger hence making it hard to fire and such. I would persue the ignition idea.
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Did you replace both fuel filters? There is one inside the reservoir (Fram C6 3862) where all your fuel lines connect behind the high pressure pump on the rail.The bottom unscrews like an oil filter, relieve fuel pressure and be ready for quite a bit of gas. This filter can produce a lot different symptons you would not expect from a gas filter.
griff777
griff777
Last edited by griff777; Jan 22, 2006 at 08:33 AM.
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replaced dist & Electronic module..
Truck only has the one fuel filter which unscrews like a oil filter on the rail. And yes it was replaced. Last weekend replaced the entire distributor and electronic module (motorcraft). Have not drove it enough to declare victory yet (10 miles).... Will keep everybody posted.
tks for all the help..
HH
tks for all the help..
HH
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