mass airflow sensor and wiring harness problems

Started by LA_Fred, February 13, 2004, 05:01:48 PM

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LA_Fred

February 13, 2004, 05:01:48 PM
A while back, I was cruising on the highway in my 89' v6 pickup and out of nowhere my engine just completely shut off. After getting towed back etc. my mechanic said that my mass airflow sensor quit and caused a short which destroyed my wiring harness. After swapping in a used one  harness and MAS, the truck drove fine but then again the same problem. After checking the harness again it turns out that a few of the wires were not installed properly. After fixing this, finally my truck has been straight for about 7000  miles. My question is: has anyone else had this problem before? Besides the MAS going out, could there be any other causes? Does the MAS just quit after so many miles or is there something that causes this? :driving:
1989 x-cab V6, SAS, Marlin dual ultimate crawler, dual arbs, high pinion, 35 mtr's, hot brunette in passenger seat.

yotacrawler85

#1
February 14, 2004, 10:32:56 AM
i think im haveing the same problem? when the MAS quits does it shut off power to the fuel pump? dumb question but i just put a neew frame under my rig and now it wont start cause no power to the pump.
85 cab on a 87 sas frame with 6 inch lift, 15x10 wheels, 34-10.50 swampers, all pro high steer, shock hoops, dual diff guards, in cab roll cage, rancho 5000s, all poly bushings remote diff breathers front and rear recievers, welded rear(4:30's) 22re

LA_Fred

#2
February 23, 2004, 06:28:11 PM
Hey yotacrawler85,
I'm definately not an expert here but all I know is that if the MAS goes out then the engine completely shuts off, no fuel, no starting, nothing.
I wonder what Marlin thinks of this??
1989 x-cab V6, SAS, Marlin dual ultimate crawler, dual arbs, high pinion, 35 mtr's, hot brunette in passenger seat.

Marlin

#3
February 23, 2004, 07:20:44 PM
When the key is turned on, engine off, the pump runs for a few secounds to pressure the system and then shuts off. The air box door will move from the engine turning over which connects the fuel pump contacts in the air box, and the fuel pump runs.

MC
1980 Toyota - 1997 3RZ-FE 2.7l Engine, Turbo R151F 4.31:1, Triple Turbo Marlin Crawler Billet (2.28x4.70x4.70) = 1,148:1 Crawl Ratio, Marlin Crawler Twin Stick and Short Throw Shift Kits, 30mm H/D Output Shaft, High Angle Drive Lines, 5.29:1, ARBs, High Pinion Front, 25mm HD Billet High Steer Kit, 6 Pin Locking Hub Bodies, 86+ Wide Rear End, V6 3rd member, Chromolly Axles all around, 37" IROKs with Beadlocks, York onboard air - Rollbar air tank, Premier Power Welder, Marlin Crawler 4" USA-made Leaf Springs, Bilstein Shocks, et cetera....

LA_Fred

#4
February 24, 2004, 02:00:19 PM
Like the master said!

Marlin you rule!
1989 x-cab V6, SAS, Marlin dual ultimate crawler, dual arbs, high pinion, 35 mtr's, hot brunette in passenger seat.
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