'88 F350 no start issues.
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Postmaster
Joined: Aug 2008
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From: Olympia
'88 F350 no start issues.
I have a problem with my F350 not starting. It is a 1988, with a 7.5L (460).
Ran codes came up;
327 - EVP - DPFE below minimum voltage.
552 - Air management 1 circuit failure.
558 - EGR vacuum regulator circuit failure.
I don't know what the code 552 is, but I think the others are all related to the emissions things, which are all missing now. (And never going back on the truck.) The A.I.R. pump has been removed and a smaller belt attached. The EGR set up has been completely taken off. Air and intake manifolds plugged off.
They have been off the truck for quite some time, and it ran fine. So I do not think that the engine not running is due to this. There is no emissions in my county, and it is pretty much an off-road only vehicle so I have no reason to go PAY for these parts to go back on the truck. I plan to get a chip to delete the emissions crap all together. (Eventually.)
Fuel pressure is around 44 psi not running at the fuel rails.
It has great spark. At coil, and plugs.
The timing is good as well.
Compression is good.
MAP Sensor is good.
Throttle Position Sensor is good.
IAC is good.
I'm stumped. Any suggestions?
Maybe my computer is bad?
Thanks in advance.
Ran codes came up;
327 - EVP - DPFE below minimum voltage.
552 - Air management 1 circuit failure.
558 - EGR vacuum regulator circuit failure.
I don't know what the code 552 is, but I think the others are all related to the emissions things, which are all missing now. (And never going back on the truck.) The A.I.R. pump has been removed and a smaller belt attached. The EGR set up has been completely taken off. Air and intake manifolds plugged off.
They have been off the truck for quite some time, and it ran fine. So I do not think that the engine not running is due to this. There is no emissions in my county, and it is pretty much an off-road only vehicle so I have no reason to go PAY for these parts to go back on the truck. I plan to get a chip to delete the emissions crap all together. (Eventually.)
Fuel pressure is around 44 psi not running at the fuel rails.
It has great spark. At coil, and plugs.
The timing is good as well.
Compression is good.
MAP Sensor is good.
Throttle Position Sensor is good.
IAC is good.
I'm stumped. Any suggestions?
Maybe my computer is bad?
Thanks in advance.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Yea none of them codes would prevent it from starting, provided the egr is closed or mostly closed. Even if it was open it should start, run like crap but start.
Are the injectors pulsing when cranking it over? Grab the fuel rail, should be able to feel it with your hand if they are, feel em clicking away.
Another option, if you give it a shot of either will it fire?
Are the injectors pulsing when cranking it over? Grab the fuel rail, should be able to feel it with your hand if they are, feel em clicking away.
Another option, if you give it a shot of either will it fire?
Thread Starter
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Postmaster
Joined: Aug 2008
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From: Olympia
Yup, injectors clicking away.
Ether/Starting Fluid/Gas will not effect starting.
It just kind of sputters randomly.. just enough to give you hope, and crush your dreams...
So basically it makes no difference.
Ether/Starting Fluid/Gas will not effect starting.
It just kind of sputters randomly.. just enough to give you hope, and crush your dreams...
So basically it makes no difference.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
It just kind of sputters randomly.. just enough to give you hope, and crush your dreams...
You said the timings on, how did you determine that?
You bring #1 up on compression stroke, verify rotor was pointing at number one plug on the cap? As well as verify firing order, and its going counter clockwise around cap? safe to assume that is what you've done?
You said the timings on, how did you determine that?
You bring #1 up on compression stroke, verify rotor was pointing at number one plug on the cap? As well as verify firing order, and its going counter clockwise around cap? safe to assume that is what you've done?
Postmaster
Joined: Oct 2008
Posts: 3,026
Likes: 0
From: Renton, WA
It just kind of sputters randomly.. just enough to give you hope, and crush your dreams...
You said the timings on, how did you determine that?
You bring #1 up on compression stroke, verify rotor was pointing at number one plug on the cap? As well as verify firing order, and its going counter clockwise around cap? safe to assume that is what you've done?
You said the timings on, how did you determine that?
You bring #1 up on compression stroke, verify rotor was pointing at number one plug on the cap? As well as verify firing order, and its going counter clockwise around cap? safe to assume that is what you've done?
yes triple check your timing something may have gone whacky on ya. like the dizzy turned.
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Postmaster
Joined: Aug 2008
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From: Olympia
Yes. Set timing and checked #1 on compression stroke.
Timing is perfect.
Wouldn't be asking if I wasn't completely sure of all of that stuff.
That's everything an engine needs to run, isn't it?
That's why I was thinking computer, but I'm not sure...
Timing is perfect.
Wouldn't be asking if I wasn't completely sure of all of that stuff.
That's everything an engine needs to run, isn't it?
That's why I was thinking computer, but I'm not sure...
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Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Yea you sounded sure but it had to be asked.
When you turn the key to "Run" without starting it how long does the fuel pump run. Does it run for a couple seconds and quit or does it run all the time?
When you turn the key to "Run" without starting it how long does the fuel pump run. Does it run for a couple seconds and quit or does it run all the time?
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Postmaster
Joined: Oct 2008
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From: Renton, WA
With this and a strong well timed spark and still no start it is time to check compression, sorry.
Postmaster
Joined: Jan 2009
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I know you said the compession is ok ?? Did you check the slack in the timing chan ?? may have jump a tooth , turn the motor over by hand & watch the rotor , then turn it back the other way & see how far you have to turn it to get the rotor to turn , if its more than 3-4 deg , replace the chain & gears , could be a bad dist gear to....Lew
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Postmaster
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From: Olympia
Compression is good, I've checked it. I will check the timing stuff again, because it seems the most likely of scenarios. Maybe it did jump a tooth.. We'll see. Update hopefully tomorrow.
Thanks again guys.
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Postmaster
Joined: Aug 2008
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From: Olympia
Well it's been quite awhile since I said anything, i've been busy. Timing is good. Engine still won't start.
Somebody suggested to me that one of the heat sensors could be bad (The computer one, not the gauge.) Would this keep it from running?
Thanks.
Somebody suggested to me that one of the heat sensors could be bad (The computer one, not the gauge.) Would this keep it from running?
Thanks.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
Most of the time this turns out to be a bad TFI Module (ICM) on the side of the distributor.