Battery voltage
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Battery voltage
I posted earlier about multiple error codes and keyless entry issues leading up to stumbling and my 2000 4.0 SOHC ltd. running like a sick dog. Before I start chasing the usual suspects would low battery voltage cause these issues? I am going to do a load test in the a.m. It did'nt cross my mind because the battery is 1 yr. old but the day it started it was 100 degs. and heat is worse on them than cold weather. Thank you for time.
Hotshot
Joined: Jul 2005
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yes, if you have a low battery, you will have multiple computer problems and run like "a sick dog". was your battery low ? Normally if the starter will crank, you have adequate voltage. If you get down to 9-10 volts, funny things start to happen.
Cargo Master
Joined: Aug 2003
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From: BC Canada
I posted earlier about multiple error codes and keyless entry issues leading up to stumbling and my 2000 4.0 SOHC ltd. running like a sick dog. Before I start chasing the usual suspects would low battery voltage cause these issues? I am going to do a load test in the a.m. It did'nt cross my mind because the battery is 1 yr. old but the day it started it was 100 degs. and heat is worse on them than cold weather. Thank you for time.
Disconnect the battery for 1/2 hr to clear all learned info, not just code clearing.
Wait until they come back, check battery connection and main harness from engine to chassis.
Clean MAF...
Wait until they come back, check battery connection and main harness from engine to chassis.
Clean MAF...
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Aquanaut20 I cleaned the cables and post two days ago and the door lock and keyless entry problems stopped. I was not able to work on it today. I will post on here what I do find tomorrow. Thanks again.
Cargo Master
Joined: Aug 2003
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From: BC Canada
Now that you have reset the tables on the PCM, run the truck and see if the codes return... Then get back to us...
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Sorry for the late update...102 degs. + kids. I cleaned MAF,throttle body checked for obvious vacuum leaks and didn't find any hoses cracked and cleared codes. Still missing when I get on the accelerator hard. Drove up the road a mile or so and would barely pull a small grade(I know this was not far enough for pcm to learn fuel trims) coming back to friends shop I matted it and ran like a banshee? cut off and refired 2 mins. later and it started loading up and missing again. I am going to put a fuel filter on Sat. and see what happens. cel on again. Voltage checked out at 12.6 volts on battery.
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RedLesPaul
1973 - 1979 F-100 & Larger F-Series Trucks
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Aug 29, 2007 10:47 AM
