Stalling, Possible timing issues?
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From: Near KC Missouri
Stalling, Possible timing issues?
With a strong lack of trouble shooting skills I come seeking advise.
On this 1986 150 4x4 5.0 EFI I have been working on I have an issue I am not sure where to start looking.
First off I have replaced every wiring loom in it, both tanks, both in-tank fuel pumps, and a multitude of other things. I am pretty sure the front High pressure pump is running. (But will check now that I thought of it)
On a note about the tanks... I have the pumps running from a toggle switch because i can not for the life of me get them to work as they should. So the side tank is not hooked up for now electrical wise.
This thing will fire up and run with a bit of a high idle then it will idle down and often die after a min. When I hit the gas it falls flat on it's face and stalls. If i feather the gas as I hit it I can get it to rev up but runs rough sort of and back fires through the TB.
I tried to time it but had issues getting it where it should be at.
Could the timing chain have slipped and cause this bad running behavior?
I have it about 7 ish BTC anything more retarded then that and It dies.
On this 1986 150 4x4 5.0 EFI I have been working on I have an issue I am not sure where to start looking.
First off I have replaced every wiring loom in it, both tanks, both in-tank fuel pumps, and a multitude of other things. I am pretty sure the front High pressure pump is running. (But will check now that I thought of it)
On a note about the tanks... I have the pumps running from a toggle switch because i can not for the life of me get them to work as they should. So the side tank is not hooked up for now electrical wise.
This thing will fire up and run with a bit of a high idle then it will idle down and often die after a min. When I hit the gas it falls flat on it's face and stalls. If i feather the gas as I hit it I can get it to rev up but runs rough sort of and back fires through the TB.
I tried to time it but had issues getting it where it should be at.
Could the timing chain have slipped and cause this bad running behavior?
I have it about 7 ish BTC anything more retarded then that and It dies.
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Joined: Jan 2001
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From: Virginia
Pull the codes. You can't troubleshoot a fuel injected engine without checking the codes.
I assume you followed the proper procedure for checking and setting the timing? You have to unplug the spout connector or you cannot set it.
I assume you followed the proper procedure for checking and setting the timing? You have to unplug the spout connector or you cannot set it.
Thread Starter
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Senior User
Joined: May 2008
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From: Near KC Missouri
Alright, Ill be back with what I find in the morning!
And no you would not assume correctly! Crap
You talking about the connector at the dist?
And no you would not assume correctly! Crap
You talking about the connector at the dist?
Last edited by Ztitan; Dec 3, 2008 at 07:31 PM. Reason: Just noticed the rest of the post about the timing.
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Joined: Jan 2001
Posts: 56,997
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From: Virginia
There are a bunch of wires going to the dist. Most of them are grouped together, but there is one that is by itself, and it should have a plug or a jumper that you can unplug somewhere along it's length. When you unplug that connector, it takes the timing control away from the computer, so you can set it to the sticker on the radiator.
Here's a site also, that explains how you can pull the codes using a testlight or voltmeter.
Ford Fuel Injection
Here's a site also, that explains how you can pull the codes using a testlight or voltmeter.
Ford Fuel Injection
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From: Near KC Missouri
Ok I got the timing correct... What a difference that made too!
I made several adjustments today as well.
I have about 36 pounds fuel pressure.
It still falls flat on it's face and stalls out when you hit the gas... but if you feather it up it will rev up.
I checked the codes And aside from an 87 which is the Fuel Pump Circuit (Pumps run off a toggle switch) I got a 63... That is the TPS right?
Would a TPS cause it to act like that though? The idle is off too sometimes runs high sometimes it runs at a normal Idle RPM.
I made several adjustments today as well.
I have about 36 pounds fuel pressure.
It still falls flat on it's face and stalls out when you hit the gas... but if you feather it up it will rev up.
I checked the codes And aside from an 87 which is the Fuel Pump Circuit (Pumps run off a toggle switch) I got a 63... That is the TPS right?
Would a TPS cause it to act like that though? The idle is off too sometimes runs high sometimes it runs at a normal Idle RPM.
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Senior User
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From: Near KC Missouri
Alright I will get one in the morning.
Anything I should know about the removal and installation of the TPS? Does it require a special twist and a secret handshake?
Anything I should know about the removal and installation of the TPS? Does it require a special twist and a secret handshake?
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Senior User
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From: Near KC Missouri
I actually found the info in a manual on Autozone website.
Not sure if I understand there vague description. But I'm sure I will figure it out.
Not sure if I understand there vague description. But I'm sure I will figure it out.
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Thread Starter
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Senior User
Joined: May 2008
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From: Near KC Missouri
Holy crap it was nasty.
Also I went ahead and replaced the IAC
Runs smooth and strong.
Thanks for the help.