Help!! fuel just started cutting out..wtf??
03-12-2009, 08:11 PM
#12
4th Gear Member
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Join Date: Oct 2007
Location: Phoenix, AZ
Posts: 1,219
i had that msd coil, it whined liked crazy so i sold it. I'll go with a crane coil when the time comes. So, what do you guy think of my fuel pressure readings. I got 42 psi w/ vacuum hose off and 34 psi with vacuum hose on.
03-13-2009, 02:01 PM
#14
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Join Date: Oct 2007
Location: Phoenix, AZ
Posts: 1,219
i taped the gauge to the windshielsd, in 1st gear at WOT fp went to 42 psi then it started cutting out and fp dropped to 34 psi arond 2500 rpms for a second or two.
Last edited by camaroeater; 03-13-2009 at 02:29 PM.
03-13-2009, 07:49 PM
#17
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Join Date: Oct 2007
Location: Phoenix, AZ
Posts: 1,219
i put a Accel cap & rotor on back in October. I looked under the cap and everything looked fine. I wonder if these cheap duralast wires(did in Nov) could cause something like this. Thanks alot for the help Mjr!
03-13-2009, 07:56 PM
#18
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
make sure maf is clean and I wouldn't trust so called newer tune up parts, I went through 3 new caps on my 66 that were cheap china immitations that caused a severe hesitation under load...I said there is noway new caps were bad right outta the box, finally I put a used one I had in my tool box that was a ford oem one and cured the issue......not saying it will cure your issue just trying to show you that you can't always assume cause it's new/er that all is well
03-13-2009, 08:07 PM
#19
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Join Date: Oct 2007
Location: Phoenix, AZ
Posts: 1,219
i don't have maf, its SD. I know what your saying about not trusting a part b/c its new. When my started solenoid went bad, the 1st new one i put on was defective. So, should i just start replacing ignition components, starting with the cheapest first?
03-13-2009, 08:21 PM
#20
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
ahh oaky, wasn't paying attention to the year of your ride....as for replacing ignition components, try the plugs first, it could be as simple as a bad insulator on the plug, lightly mist wires with a spray bottle and look for spark arcing out...if you see any= replace wires......generally I don't like to slap parts on a car without verifying where a misfire is, but that requires proper test equipment and in your case I know you don't have an occiliscope to view the secondary ignition parade pattern and or the firing voltages, so all you can really do is try the parts replace route
....as for replacing ignition components, try the plugs first, it could be as simple as a bad insulator on the plug, lightly mist wires with a spray bottle and look for spark arcing out...if you see any= replace wires......generally I don't like to slap parts on a car without verifying where a misfire is, but that requires proper test equipment and in your case I know you don't have an occiliscope to view the secondary ignition parade pattern and or the firing voltages, so all you can really do is try the parts replace route