 My teener won't fire., Just re did the fuel pump wireing. |
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| Eric Taylor |
 Dec 31 2003, 07:15 PM
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Senior Member  Group: Members Posts: 909 Joined: 1-June 03 From: Newport, OR/Eugene Oregon- UO Member No.: 770  |
So, today while trying to figure out my fuel problem I noticed that my fuel pump was running off of the coil, and batt ground. I've been told that the coil should not have to push any other devices, so I decieded to wire it back to the stock wireing. Well that went smoothly and now my pump primes for 2 second's and shut's off , YA!, but the car won't fire. I know it's the new wireing because it did fire when running off of the coil. It seams to me that if I'm hearing it prime that would mean that it is getting 12 volt's. So does this mean I have a bad relay?
Eric |
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| 3d914 |
Jan 1 2004, 10:36 AM
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Senior Member Group: Members Posts: 1,275 Joined: 24-September 03 From: Benson, AZ Member No.: 1,191 Region Association: Southwest Region |
Eric,
Another thing to check is on the relay board. Someone may have re-wired it to solve a problem on the relay board. But you can test it to verify its working properly. FOR FUEL INJECTION At the white connector in the lower-left corner of the relay board there are five leads coming out of four pins in the connector. Most of these leads go to the ECU. (This is looking forward at the relay board - from back to front.) Looking down on the four pins of that connector - the upper-left & lower-right pins need to be tested. The upper-left pin is the fuel-pump power. If you turn on your key (without starting) you will get 12V at this pin. Once you start cranking the car, the 12V for the fuel-pump drops from this pin and it is now powered off the starter lead - the pin in the lower-right. You should get 12V at the fuel-pump when the car is cranking. Once the car is running (you've stopped cranking), 12v returns to the upper-left pin. This is assuming you've checked the relay as previously suggested. FOR CARBS If you're running carbs, then someone has tried to bypass the fuel-pump voltage swap designed onto the relay board - so that the pump is powered at all times. And you cannot simply jumper the upper-left pin and the lower-right pin - cause then you're starter will have power constantly. You can power the fuel-pump off the main switched 12v power lead which is the upper-right pin of this connector. Keep in mind the fuel pump will be running at all times when the key is in the ON position. Let me know the results, Regards, |
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Posts in this topic
Eric Taylor My teener won't fire. Dec 31 2003, 07:15 PM
redshift So there was a hardwire to the + side of the coil.... Jan 1 2004, 02:20 AM Brad Roberts Check the fuse on the relay board for the fuel pum... Jan 1 2004, 02:37 AM rhodyguy imho you want the pump to run when you turn the ke... Jan 1 2004, 11:19 AM Eric Taylor Alright, so tried the test relay idea, and it work... Jan 1 2004, 04:28 PM Brad Roberts Ok. This tell me three things:
1. the ground is g... Jan 1 2004, 05:03 PM Eric Taylor Hummm. I just put in the old coil wireing and it s... Jan 1 2004, 07:25 PM trojanhorsepower This is a dumb question, but have you double check... Jan 1 2004, 09:11 PM Brad Roberts Good point. You may have removed the coil pos. whe... Jan 1 2004, 09:15 PM Eric Taylor Found it! :trophy: Everything was fine with t... Jan 2 2004, 03:42 PM Brad Roberts Everyone needs a Bowlsby harness they just dont kn... Jan 2 2004, 03:57 PM
Eric Taylor lol, this is a bowlsby harness :) It's a great... Jan 2 2004, 04:02 PM |
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