I hate being lost

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Aug 22, 2011 | 04:29 PM

1977F1504X4AUBURN

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I hate being lost

I have a couple issues and I believe they are related to timing.

1: My truck boils the radiator fluid. The heat rises gradually after 20min of driving and then fluid starts coming out of the over flow.

2: It has off idle hesitation. I can drive down the road in forth gear, mash the accelerator and it's sluggish. If I ease up on the pedal after mashing it then it will accelerate slower but a lot smoother.

Maybe I have two separate issues but I can't help but think they are related. The over heating could be caused from having the timing retarded but then the sluggish acceleration is usually a advanced timing issue. I just don't know anymore. Maybe it's a lean fuel issue.

Aug 22, 2011 | 04:37 PM

V10Crew

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Have you checked your entire cooling system? Thermostat, water pump, radiator core....

Aug 22, 2011 | 04:44 PM

1977F1504X4AUBURN

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It has a new RT139 thermostat and the fluid is moving. I don't know how to check the radiator... it doesn't leak externally or anything like that.

Aug 22, 2011 | 07:57 PM

4x4 Bart

Fleet Mechanic

Joined: Feb 2007

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From: Middle TN

When you floor the accelerator, does it bog then backfire through the carb? This would be a lean symptom.

Aug 23, 2011 | 09:42 AM

1977F1504X4AUBURN

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It doesn't backfire. It bogs down then slow starts to accelerate. I have an Edelbrock 1405 so I put in stiffer step-up springs. I went to the plain ones (stiffest). If that doesn't help the power mode of the carb then I'll try different jets and rods to rich it up. I still don't know why it's getting hot. The thermostat works. I took the cap off the radiator last night and saw the fluid moving. It wasn't moving very fast though but maybe that's normal.

Aug 23, 2011 | 10:04 AM

V10Crew

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Drain your radiator and shine a light in there to see if the tubes are plugged with debris,

Aug 23, 2011 | 11:31 AM

gfw1985

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From: Raphine, Virginia

Probably unrelated. Look down throat of carb with engine off and move accelerator. You should see the accelerator pump shooting gas immediately. The squirters clog up easily on that carb. Pulling the nozzle off there is a check ball and weight, carefull not to loose them down the carb.