Fuel Pump ???

[gr8regal]

Have an electrical gremlin!
1. Replaced starter.

2. No fuel pressure-- replaced fuel pump with NAPA replacement-- lasted two three weeks

????? What is the difference between the Walbro 307 and others like the walbro GSS340M.

If I'm going to change the fuel pump again I might as well replace it with a good one and hot wire it at the same time.

Then I might get this rebuilt motor running again.

 

[6SENSE]

Do you have an electrical problem or a bad fuel pump problem .
Of course either one could cause your problem, but need a little more info. Plus if the ECM is not getting power the pump wont turn on either. You can give the pump a jolt of power at the plug by the tank to check and see if it works. Also, there is a 15amp fuse on the fuse panel for the pump/injectors. Ive ran into a situation recently on my brothers car where the Fuel Pump test lead on the drivers side wiring harness (there is one with a brown plug and one with a green plug that dont go to anything, I believe it is the one with the brown plug) was touching the drivers header and grounding out causing the fuse to blow, thus no fuel pressure/pump turn on.
Need to know a little more info as far as what is actually going on.
Are you saying that after replacing the starter you started having this problem?

P.S. In the case of choosing another pump, I would definately go with the 340 if I had a choice.

 

[gr8regal]

Gremlins of a 84 GN

Where do I start---

First the history--

I seen the car about 2 years ago on a used car lot. I was looking for regal parts. (another project 455). He told me that it was a grand national . Some kid took it out for a run and brought it back with a spun bearing. The car had a 87 set up in it at the time. the dealer did not know any thing about gn's and had a 84 motor rebuilt, knowing it was a 84. Well they rebuilt the engine and he states that they could not get it to throttle up, only idle. He took it to three different electrical shops and no-one could get it to run right. He was ticked and let it sit for the last year or so. I went back later and found that it was still for sell ( he just wanted to get rid of the thing). It was flatbeded to MY house.
Now I tried to start it. nothing, no click no nothing. I checked every thing. Drop the starter and hot wire it no dice, Bad starter- no problem changed the starter. Try to start it up - it turns over but no start. Checked the fuses, and spark. Have spark!!!
Checked fuel - no pressure. The fuel pump is straight wired from the fuse box. I have power to the pump. (No pump noice). I dropped the tank and tested the pump. no good. I run up to NAPA and grab a stock replacement. put it back together and now I have positive fuel pressure to the regulator. I also replaced the regulator while I was there. THe car still would not start so I checked the code manually, 12 12 12 12 12 12 only ( no codes) crap! Checked the voltage to the ecm checks out Okay, checked the ignition module ( still the 87 set-up) the B post for the crank sensor would not read voltage!!! so the possibility is ignition module Right! I am getting another ignition module and ecm.
But while i was checking out the car I would check the car cranking it up, JUST BY CHANCE IT MIGHT DECIDE TO START. then I wouldn't hear the pump. No pump- have power but no pump -- I drop the tank and pull the pump and its bad even hot wiring it no run, return to NAPA. No others in town SOOOOOOOO! Now I am changing to the Walbro pump the 340 or the 307 I don't know which, and I will re-run the hot wire kit.
After I get fuel- spark-and Ignition to checks out I will know more then. I have been following all the other No-start promlems on this board but Each car seems to have a innate GREMLIN within it steel frame. Just a little history!
Any Ideas

 

[Lee Thompson]

pump

Bad gas ( sitting for an extended period of time ) will do something to the seals in the pump. (No run ) Does the gas smell old?

 

[gr8regal]

Bad Gas

Bad GAs drained the tank! Starting with empty tank and NEW GAS.

 

[6SENSE]

Changed the fuel filter right? No telling what got into the lines (basics first).
Also, you mentioned the '87 ignition. You are saying that it has an '87 coil and '87 module, or just '87 coil (with '84 module)? Im asking this because you said that the guys at the carlot didnt know nothin about these cars. They replaced the '87 setup with an '84. Did they replace it with a complete '84 setup, wiring harness and all? because the wiring to the module is setup different between the '84-'85 and the '86-'87.
That was just a thought of a possible problem, but if you just plain and simple are not getting fuel pressure at the rail, youve got to solve that first. Simply if pump is working then you should have fuel at the rail, unless of course you have some sort of blockage (i.e. fuel filter, lines clogged). If regulator is working you should have proper pressure at rail 34-43 static (with vac line off) depending on which regulator you have on it. Unless of course your problem is at the injectors somehow and gas is just going by into the engine, but I doubt it. Sounds like your problem is between the tank and the rail (basics first). Keep us posted, not to many things it could be. You'll track it down.

P.S. Ive killed a pump before with debris at bottom of baffle in tank. Had new gas but didnt know there was rust, etc. in there from car sitting so long. It kept clogging up the fuel sock and under boost the fuel pressure would go down instead of matching the boost and go up. Enough made it through the lines to clog the fuel filter up pretty good too.

 

[gr8regal]

87 wireing

Then car was replaced with the 87 everything. ecm and all. So i have a 87 ignition module 87 and ignition module also! That module is sitting on top of the 84 bracket. I need the conversion bracket. the 87 module bracket is different.

When I replace the pump I will flush out all the lines, change everything associated with the system.

What might be the easiest way to flush the injectors and fuel rail????