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corsas you have a PM....

Hey everyone, Did a search, couldn't find much on this. Here's the problem. My tach stops working accurately when running the car under full throttle, but only under full throttle. If you run the car up to 5500 rpm slowly under partial throttle the tach reads fine, never misses a beat. If...

BIG thanx to liljoe Thanks so much for walking me through this. It wasn't hard to find the wires because I left them right where they were. You were 100% correct though, once I connected the wires everything worked pefect. I just hope everything else works fine. It seems to now but I am...

So let me see if I am reading you right. You are saying that the blue/orange wire comes out of pin #22 on the ECM, goes to the VIP Test Connector, then out of the test connector and to the relay right ??? Do you know if the wire splits and turns into 2 blue/orange wires with one going to the...

Well let me ask you this. I don't want you to think I am an idiot, I have built this whole car myself, but I did screw up. When I was hiding the wires, I accidentally cut the plug for the VIP/Test Port Plug off. The wires are still in the loom the connector is just no longer connected. Would...

OK, Did what you told me, I don't have a test light so I just used my DVM. I also used the pink/black wire for the 12V power. Nothing there key when I turn the key. I checked for continuity from pin #22 to the blue/orange wire under the seat. No continuity. Ideas ???

update Well as my luck would have it I got a new relay right from Ford and it didn't do *****. The new relay is a new design and it has one extra pin on top that goes into an empty socket on the relay plug. The guy at the dealer swore that it was the correct one for the application though...

Well that's not a problem, if this all works out it will be worth it !!!! Thanks again for the help !!!! :hail2: Hopefully you will be around if I have any other problems once I get the pumps on. I also did a little re-wiring with this project. All I really did though was take the huge...

I will do that, I will take the relay in for a visual aid, I think I am going to try the ford dealer this time to make sure I get the right relay. I just hope that I didn't mess up the ECM. I just completed welding up some of the holes in the engine compartment. The weird thing is that I...

So not to re-state the obvious but the relay isn't doing its job then correct ??? If that's the case, the drug addict punk @ the parts store gave me the wrong relay too !!!!

Good NEWS !!!! It worked what might be bad news though is the fact that it didn't "cycle" I don't know if it will with the jumper in though. There is battery voltage @ pink/black all the time and with the key in the KOEO pos. the red wire has power too. What do ya think ????

OK just went out there, the relay under the seat has 4 wires, Red, Green/yellow, Pink/Black and Blue/Orange. There is no black orange. I have battery voltage @ the pink/black wire so I tried to jump it to the orange & blue one and no luck. Do I have some sort of bastard car ??? I bought this...

[/IMG] [/IMG] Hey Guys, here's the deal. I went out to see if I could use the relay from out by my mass air meter and plug it in under my seat. Just my luck, it will not work !!!! The relays are different. I figured you guys might like to see pics to clarify what is going on here...

Thanks liljoe !!!! I will try this when I get home. For some reason I don't know if the relay that NAPA sold me for the fuel pump relay will fit in this socket but I will try it the minute I get home... Also is the test port on the 91's still located around the brake booster ??? I have...

OK Well I can do some more checking for you guys, should the WOT relay click when the key gets turned on as well ??? Because the relay up by the mass-air meter is clicking when I turn the key to KOEO. The relay under the seat does nothing.

Hmm Hey Joe, First thanks for the reply, I feel like I am seriously screwed here so I really appreciate the help. Do you have any idea what the relay under my seat might be for then ??? It is smaller than the one I believe to be my fuel pump relay...

Hey Guys, It seems like there are quite a few on here that are having a problem with the fuel pumps not priming when turning the key on. I am having the same problem. I have a 1991 Mustang LX. Original V8 car. Here's the twist, it has to do with wire colors and relay location. Everyone on...