Stalling Stang
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Stalling Stang - 5/3/2008 6:12:23 PM
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gobabygo
Posts: 77
Joined: 3/9/2008
Status: offline
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so, i'm still having problems with the mustang not reeving smoothly, motor sounds like it's under a heck of a load when revving in neutral. I changed the fuel regulator, i have the timing set to 10 degrees. I'm not sure what stock is supposed to be set to on 87-89 pump gas. The harmonic balancer goes from -10 to 0 to like +40 maybe. The car idles fine but wont get up and go. I thought it might be the fuel pressure so I got a gauge and it reads 30psi with the vac hose on and 40 with it off. When the car is revved it goes all over. I pinched the return hose and the pressure shot up to around 60-70psi. The Haynes manual suggested a new regulator. So i blow 50 bucks and got another one. Same thing. No change. Any suggestions? CEL not on. Timing? Stopped up Cat? fuel pump? injectors? I'm at a loss.
< Message edited by gobabygo -- 5/3/2008 6:18:43 PM >
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The problem child
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RE: Stalling Stang - 5/3/2008 7:54:03 PM
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mjr46
Posts: 8355
Joined: 6/13/2007
Status: offline
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quote:
ORIGINAL: gobabygo
so, i'm still having problems with the mustang not reeving smoothly, motor sounds like it's under a heck of a load when revving in neutral. I changed the fuel regulator, i have the timing set to 10 degrees. I'm not sure what stock is supposed to be set to on 87-89 pump gas. The harmonic balancer goes from -10 to 0 to like +40 maybe. The car idles fine but wont get up and go. I thought it might be the fuel pressure so I got a gauge and it reads 30psi with the vac hose on and 40 with it off. When the car is revved it goes all over. I pinched the return hose and the pressure shot up to around 60-70psi. The Haynes manual suggested a new regulator. So i blow 50 bucks and got another one. Same thing. No change. Any suggestions? CEL not on. Timing? Stopped up Cat? fuel pump? injectors? I'm at a loss.
of course the pressure will spike when you pinch the return line..the test you did meant nothing.....as for the issue at hand..have you tried a new fuel filter?? = if not see if old one is restricted..and if you have a maf equipped mustang try cleaning it
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ORIGINAL: AdderMk2
im an asshole.... deal with it
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RE: Stalling Stang - 5/4/2008 7:49:50 AM
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aode08
Posts: 3743
Joined: 10/27/2005
From: Cincinnati, Ohio USA
Status: offline
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new fuel pump and strainer ftw
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RE: Stalling Stang - 5/4/2008 9:33:38 AM
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brentloftis
Posts: 259
Joined: 3/26/2008
Status: offline
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What is the fuel pressure when at the peak 2500 RPMs? Also when you say it go go above 2500, what happens, is it like a rev limiter, or does it start bucking around? It could be the pump but just doesn't sound like it to me. Still reminds me of timing "-10 to 0 to like +40 maybe" ????
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Brent
1983 F150 351W (Work Horse)
1988 Mustang EFI 302 (Project)
1994 Suz GSXR 750W (DD)
2000 Pont Grand Am (DD)
2000 Mits Eclipse GT (GF's DD)
2007 Kaw Ninja 250 (GF's Weekender)
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RE: Stalling Stang - 5/5/2008 7:59:31 PM
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brentloftis
Posts: 259
Joined: 3/26/2008
Status: offline
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What is the smell you mention under the hood. If your unsure of the head gasket do a compression or leak down test.... if you have neither tool, disconnect the coil, then pull one plug at a time and crank the engine over and see what blows out of the hole, use a white towel to see the color. If coolant is getting in the cylinder it will blow out the plug and tell you right away, you can also use this time to look at your plugs as you cycle through the above steps. Note color and such to help further diagnose.
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Brent
1983 F150 351W (Work Horse)
1988 Mustang EFI 302 (Project)
1994 Suz GSXR 750W (DD)
2000 Pont Grand Am (DD)
2000 Mits Eclipse GT (GF's DD)
2007 Kaw Ninja 250 (GF's Weekender)
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