88 5.0HO won't idle - MustangForums.com


5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 04-13-2012, 11:36 PM   #1  
FMLX3
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Default 88 5.0HO won't idle

Need some help, I recently purchased a 88 saleen as a project car, it will start but dies at idle. I ran the codes and a 34 and 87 came up.
34= EGR
87- Fuel pump relay
I think!

Could these cause the problems or should I be looking at something else?

Any help would be greatly appreciated
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Old 04-14-2012, 12:35 AM   #2  
enix187
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What does the car do if you feed it throttle? how does it run while its running, need a bit more to go on man
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Old 04-14-2012, 09:28 AM   #3  
FMLX3
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It will start if I feather the throttle and keep feathering but as soon as I let off it will die out. I have checked the timing and it is at 10 degrees and I have spark across the board. I checked fuel pressure at the rail and it squirts across the garage. I don't have a gauge. I was wanting to eliminate the smog pump, should I block off the egr and avoid spending the eighty dollars. The other question is are the fuel pump relays a two stage relay, the fuel pump kicks on with key on and the relay also clicks but then clicks off but should it still keep power to the fuel pump?

I am fairly new at the whole car thing so please bear with me.
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Old 04-14-2012, 09:31 AM   #4  
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It will not maintain RPM, it jumps around even with a steady foot, with a little intake pop. I have also checked vacuum lines across but I could have missed something.

Thanks and hope this info is a little better.
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Old 04-15-2012, 11:06 PM   #5  
TrimDrip
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Try taking off the egr valve to make sure it is not stuck open.
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Old 04-16-2012, 03:02 AM   #6  
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What does the car do if you feed it throttle?
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1988, 50, 88, body, drives, ford, fox, fuel, high, ho, idle, mustang, revs, runs, wont

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