Engine is hard to start and idles poorly at 1/4 tank reading
Hope someone may have a reason on this. When fuel gauge is showing 1/4 tank or less, Blazer become stubborn to start and idles poorly. I currently don't have truck to look at.
Mechanic who did brake, suspension and some mechanical repair commented on this, and put more fuel in. When I first brought it home, there was around 1/2 tanks and started easily etc. As we ran fuel down while testing things including temperature gauge replacement, once fuel gauge got to around 1/4 it again became hard to start. I think put around 10 gallons in to Blazer for my trip to body shop, and it again started easily on all occasions. After the drive it was down to showing 1/4 tank, but driving normally. As soon as I pulled up, put trans in park it stalled, like out of fuel. Fuel gauge could be out, but seemed to operate perfectly on trip, original mechanic had put some fuel in it and was still acting poorly. Put new fuel pump on but situation remained, put more fuel in, problem gone. The truck does have the remnants of an auxiliary tank, so fuel lines are a bit of a mess. This is planned to be fixed. Any other thoughts on this, why fuel feed would diminish when tank gets low? |
Re: Engine is hard to start and idles poorly at 1/4 tank reading
Maybe the sending unit is off a bit and when it reads a quarter it’s really empty.
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We could get it to start at low level, just took multiple attempts. I'm wondering if the venting canister maybe an issue? |
Re: Engine is hard to start and idles poorly at 1/4 tank reading
I had a Japanese beetle floating in my tank, it would shut off fuel when it was low, took me forever to find the problem. I would start by looking for the problem by checking flow at fuel pump inlet and then go backwards to the tank, maybe blow out lines with about 5 psi of air
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Re: Engine is hard to start and idles poorly at 1/4 tank reading
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I'll check tank for any insects too :) |
Re: Engine is hard to start and idles poorly at 1/4 tank reading
Sounds basic but maybe fill the tank, let it run down till the symptom happens. Fill it back up and see how many gallons that takes as compared to factory capacity. See if it’s really a 1/4?
Seems the sending unit arm could be bent. You could have some sludge in the bottom that more fuel dilutes and it only becomes an issue with less fuel? Just random thoughts. Good luck with it |
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Re: Engine is hard to start and idles poorly at 1/4 tank reading
When I had a truck with dual tanks the selector valve was messed up.my truck would run out of fuel. It seams that it would send the return fuel to the 2nd tank. Water in fuel? Methanol fuel loves to attract water. Fuel gauge off? Maybe a rust hole in the pickup tube?
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Thinking maybe I should have blocked the old feed line, getting air? |
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