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A code 172 for the EEC-IV is "HEGO (Heated Exhaust Gas Oxygen) sensor - voltage signal indicated lean in Bank #1" and a 327 is "EGR Valve Position (EVP) sensor, Pressure Feedback EGR (PFE) sensor or EGR Pressure Transducer (EPT) - signal voltage too low."

You might want to double check and make sure the inertia switch in the trunk hasn't been tripped. It's behind the trunk liner on the driver's side near the turn signal housing. There is a button that you just press to reset it. You can also use a test light or voltmeter to make sure there is...

I also found these: Mustangs Unlimited - The Premier Source for Mustang, Shelby and Cougar Parts and Accessories "These bright bulbs have a High/Low dual filament construction to replace the OE bulb. Though the glass is blue, these bulbs light up as a very intense 'white' light, far superior...

There is VisionPlus from Philips, which according to their website will provide "a beam that’s up to 50 feet longer than conventional bulbs". But it doesn't mention if it's a white beam or the bluish kind. There is also the GE Nighthawk, which gives "a clean white light with 90% more light...

Thanks for the offer, Nota4.6, but they aren't that expensive at Advance Auto for a set; about $30 so I ordered them today. Should be in tomorrow after 7:30am and then I'm onto the next project...time to replace the plugs and do an oil change. LOL

Or how mine looked:

Got the car back and drove it to work this morning and it's running just a good or better than before. Not sure what brand of pump, cost is more a consideration that max performance, but it's much quieter than any other Mustang fuel pump I've ever heard/owned. I checked for codes, to make...

I've always heard that the front lower lip spoiler was important in making sure that our 'Stangs run cool in hot weather. But after living with my '94 in North Carolina the past 2 years and not having one on mine, I can't say that my water temp has ever been past the middle of the stock temp...

Just an update on my Code 542 - No Start issue: After talking to my neighbor yesterday and today, he dropped the tank and discovered that there was indeed power to the fuel pump at the tank, but he still couldn't get it to prime. Ordered a new one yesterday and it came in today. He's...

Thanks toyman and Nota4.6 for the suggestions/ideas. When I got home this morning from work and read your replies, I was going to pass that info onto my neighbor....unfornately, he came and towed the car over to his place to work on it while I was catching a nap from a rough night at work. I...

Well since I didn't get any answers, I guess we'll have to tackle it in stages. My neighbor is planning to come by tomorrow and drop the gas tank down and test if there is power going into the pump at the connection on top of the tank. If there's no power there, I guess we'll just backtrack...

I recently had my neighbor do some work on my car to get it ready for the annual safety inspection. Namely replacing the front brake pads and turning both rotors to solve a vibration under braking issue I had and replacing the driver side parking/turn signal assembly . that was broken in an...

I've been having the same issue with my temp gauge jumping around from one side to the other and then settling around the "L" in NORMAL. I replaced the t'stat and it moved the needle down to the middle of the M and the A, but it would still surge. Today I replaced the temp switch (sending...

Today I discovered where the slight vibration in my '94 GT was coming from...the harmonic balancer had decided to come apart @ 225,000 miles. A search of the forums, following a few links here and there and I had the info I needed to tackle this job. I picked up a Pioneer non-SFI HB at one of...

Looks exactly like my wiring harness. I beginning to wonder how common this problem is and if it's the same wire in the harness that has the shorting out problem. I'll probably replace the harness in the future, but right now I've got a few other things to spend my cash on, like a less...

Can't help with the remote keyless entry, I don't have that option, but I might be able to shed some light on your other issue. I recently bought my Mom's '94 GT and discovered that it had the same problem. When the headlight switch was "on", the parking lights & dash lights would not be...

Thanks so much for posting this. I just bought my Mom's '94 GT (she's almost 70yo :D) and it was very annoying to look down at night and not see the switch lit up, like it used to. LOL I figured there had to be a way to replace the bulb and had taken the switch apart myself, then realized I...