New post, same problem. I posted this some weeks ago where I changed my plugs, wires, and filters, then miserably failed an air-care test. Well as I reposted, I had been a little careless when installing the plugs and cracked the porcelain insulator on 1 (or more) plugs. I since replaced ALL the NGK's with Bosch plugs (I blamed it on the NGK's, but that was wrong). So now it runs well, but won't idle. It "hunts" if you know what I mean. If I come to a stop, it will stall unless I put it in neutral. In neutral it will stall if I turn the steering wheel. If I put ANY load on the engine in neutral, it will stall. So I figure that when I changed the plugs I have knocked or broken or undone a vacuum hose or some other EFI mechanism. If I hold the pedal at 800-900 RPM, no problems, but that is wrong. I can't find or see any problems.
Anybody have or know of a schematic of the EFI system and vacuum hose routing to troubleshoot this goof-up?
As always, thanks in advance.
Last edited by re_fill; 11-02-2006 at 11:25 PM.
Reason: my Pinto de-Tomaso got rear-ended and DIDN'T blow up, the Firenza did
My hose diagram is hard to read where they put it. A digital camera helps a lot. If you do not have one a MityVac vacuum tester is about $30 then you will know all the vacuum systems are correct. Then you did not mention pulling codes?
If your ignition control module is a black Motorcraft (CCD system) do not replace it with a gray one (Push Start system). The wiring harness is different.
FTE is great! Be a supporter to keep this forum going. 94 5.8 EB, towing package, K & N drop in, MSD Blaster, 9 mm Ford Racing Wires, mechanical oil and temp guages and the rest all stock.
Try looking at the red vac lines on top of the motor they are made out of a hard composite material and can crack with out it being visable my truck would stall at every light once I changed mine on my 93 bronco no problem it has run fine since.
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