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Old 11-23-2016, 02:40 AM   #1
2 Rivet Member
1988 34.5' Airstream 345
San Francisco , California
Join Date: Sep 2015
Posts: 22
Solved mileage and power problem

Solved a problem and thought to share.

I bought my 345 with gas 454 last year. In prep for a 3,000 mile road trip home, I had some mechanics do some basic maintenance and upgrades. Mufflers were shot. So, I had them install a banks power pack.

Trip went well except for swapping a lot of rear fuel filters every time I'd climb a western grade or cross a railroad track...sediment. However, I got crap mileage, ~5mpg, and it was REALLY slow going up grades.

So, power problem got worse after I got it back. I'm looking at fuel system, carb tuning, etc. didn't have time to wrench. So, I brought it to the mechanic.

It turns out that the mechanics didn't put spark plug wires properly back in loom after replacing headers and muffler. The heat from the headers melted 3 wires as they were just laying on the bare metal. I had been running on 5 cylinders for ages.

Of course, now that I'm back on 8 cylinders, this thing is quick!

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Old 11-23-2016, 08:46 PM   #2
1987 Avion 34W owner
PaulnGina's Avatar
Vintage Kin Owner
Good Ol' , USA
Join Date: Mar 2014
Posts: 2,080
Missing 3 cylinders, was it not obvious something was wrong just by the sound of it running?
I this great country!!!!
1987 Avion 34W
1995 Ford F250 7.3L PowerStroke
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