North East F-Body Association - bought a used plow truck

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North East F-Body Association (http://www.northeastf-bodyassn.com/index.php)

- 1990's (GM) (http://www.northeastf-bodyassn.com/forumdisplay.php?f=54)

- - bought a used plow truck (http://www.northeastf-bodyassn.com/showthread.php?t=5678)

DavidS

01-28-2015 07:03 PM

Quote:

Originally Posted by ILuvPizzaTimes10 (Post 89431)

those have bad grounds under the drivers door. well closer to the bed. its a small bolt on top of the frame rail with a black wire coming from it. usually the problem with the bad gauges. or you are right and its the sender. if you are doing pump yourself pull the bed. easier then dropping tank and dealing with evap hoses that are brittle and 15 years old.

I took a look this morning and could not find the ground.

Online, I found a guy with a 94 GMC 1500. Like you said, he found his ground connected on top of the frame. It was under a electrical connector. I'll probably have to wait until I get the bed off to check this ground.
http://www.gmforum.com/attachments/g...ump-ground.jpg

http://www.gmforum.com/attachments/g...ound-frame.jpg

DavidS

02-02-2015 02:47 PM

It's still throwing the code P0300 "multiple misfire detected".

I ordered new plugs and wires. Hopefully that will work.

ls6monte

02-03-2015 10:27 PM

Don't forget to check for a clogged injector also.

DavidS

02-04-2015 02:14 AM

Quote:

Originally Posted by ls6monte (Post 89479)

Don't forget to check for a clogged injector also.

OK Ron. Will do. Thanks!!!

Frank also suggested checking the distributor cap and rotor.

ls6monte

02-04-2015 10:40 PM

Ooops. Thought it was v8. The v6 doesn't really have injector problems like the 8's do. They have a spider type tbi injection which has it's own problems.

DavidS

02-05-2015 01:47 AM

Quote:

Originally Posted by ls6monte (Post 89495)

Ooops. Thought it was v8. The v6 doesn't really have injector problems like the 8's do. They have a spider type tbi injection which has it's own problems.

I think you're right Ron. It looks like lots of people change it to this: http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1

I don't really understand this, but a lot of comments on it are like this one:

Quote:

replaced my stock SCPI (Sequential Central Port Injection) with this MPFI (Multi Port Fuel Injection), this works much better than the old system, and is "plug n' play". It has the same Multec II as Corvettes, etc. It bolts on with no changes.

frankzlt1

02-13-2015 10:10 PM

dave plow truck still alive lol.

DavidS

02-14-2015 12:46 AM

Quote:

Originally Posted by frankzlt1 (Post 89533)

dave plow truck still alive lol.

Plowin like a champ Frank!

I plowed 3 times and no codes.

Then on the last time, I went to get out and like a moron, forgot I had a standard and stalled it. Then it threw a multiple misfire code.

I got spark plugs, a dist cap, rotor and amazon injectors ready for temps above 40. One of these friggin things will hopefully fix it.

DAWG	02-21-2015 07:47 PM

my 99 used to do the misfire thing. found I have bad plug wires.
start in the dark and see if the wires glow.

DavidS

02-21-2015 09:31 PM

Quote:

Originally Posted by DAWG (Post 89580)

my 99 used to do the misfire thing. found I have bad plug wires.
start in the dark and see if the wires glow.

Good idea Dawg. Thanks!

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