no power after warm up
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New User
Joined: Oct 2003
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no power after warm up
I have a 89 f-150 5.0 5 speed 4x4 and after warmed up it has no power. The other day I was trying to climb a hill here in Pa. and a rubber hose that comes off the exhaust and up to the egr? blew apart. I needed to be in 1st gear at 3000rpm just to inch up this hill. Tuned it up about a month ago. Changed fuel filter yesterday with no help. It seems to do fair on level ground but there aint much of that here. Ran codes and got 34, 86 and 87. Can't find my code book to see what these mean. Haynes book did'nt say anything I could find. If there is anyone out there who could help me with some suggestings I would greatly appreciate it.
------------------------------------------------------------------------------------ CENTRAL PA. MOUNTAIN CLIMBER
------------------------------------------------------------------------------------ CENTRAL PA. MOUNTAIN CLIMBER
Laughing Gas
Joined: Mar 2003
Posts: 877
Likes: 1
From: Colorado, U.S.A!
My book says 34: EVP voltage above closed limit.
Doesn't say anything about 86, but 87 means fuel pump primary circuit failure.
I'll check my other books and if I learn anything else, I'll post it.
You're not sure that hose went to the EGR? Maybe it's one of the hoses from the air pump to the exhaust. My 89 302 has a metal line to the EGR from the intake manifold.
With that hose blowing up , maybe the check valve it connects to is bad and maybe you have a plugged exhaust. I'd be looking at the fuel pump circuit first.
Doesn't say anything about 86, but 87 means fuel pump primary circuit failure.
I'll check my other books and if I learn anything else, I'll post it.
You're not sure that hose went to the EGR? Maybe it's one of the hoses from the air pump to the exhaust. My 89 302 has a metal line to the EGR from the intake manifold.
With that hose blowing up , maybe the check valve it connects to is bad and maybe you have a plugged exhaust. I'd be looking at the fuel pump circuit first.
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 103
From: Ashland City, TN
EGR wont effect that.
I found out mines not even connected to the exhaust, its just dangleing there.
There is a metal line about 90% of the way for it from what i can see, just a lil high pressure ruber hose for one angle, so there can be some movement between the exhaust and the engine would be my guess.
EGR wont cause this problem.
His timeing could be off, Bad Voltage.
Maybe hes not getting enough gas?
pluged exhaust sounds feezeable too. but.... I think it would just stop running, or the headers would burn off, or the engine overheat.
I found out mines not even connected to the exhaust, its just dangleing there.
There is a metal line about 90% of the way for it from what i can see, just a lil high pressure ruber hose for one angle, so there can be some movement between the exhaust and the engine would be my guess.
EGR wont cause this problem.
His timeing could be off, Bad Voltage.
Maybe hes not getting enough gas?
pluged exhaust sounds feezeable too. but.... I think it would just stop running, or the headers would burn off, or the engine overheat.
New User
Joined: Mar 2004
Posts: 4
Likes: 0
You should not have a rubber hose running from your exhaust to the EGR. Exhaust is high temp, rubber hose?
My EGR has a metal pipe that connects from the exhaust to the EGR. It is also cover with a high temp woven material. If the metal EGR tube has ruptured then it could have blown the woven cover apart. I have had this happen on my truck and other than an exhaust leak noise; it did not affect the running condition of the engine. This is probably what happened to the EGR tube and it can be purchased aftermarket cheaper than a Ford OEM part.
Based on your codes, I would agree with c96drumm to look in other areas.
You should probably replace the EGR tube if that is what ruptured. The exhaust leak will only get worse.
My EGR has a metal pipe that connects from the exhaust to the EGR. It is also cover with a high temp woven material. If the metal EGR tube has ruptured then it could have blown the woven cover apart. I have had this happen on my truck and other than an exhaust leak noise; it did not affect the running condition of the engine. This is probably what happened to the EGR tube and it can be purchased aftermarket cheaper than a Ford OEM part.
Based on your codes, I would agree with c96drumm to look in other areas.
You should probably replace the EGR tube if that is what ruptured. The exhaust leak will only get worse.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
86 is adaptive fuel limit reached. It looks like the truck is either running extremely lean or running extremely rich. Check fuel pressure and check the fuel pumps. 87 is for the primary circuit on the fuel pump relay - from the relay to the computer is the primary. Check all related wiring.
