Chevy Silverado and GMC Sierra Gasoline Engine Problems
I have a 99 Silverado w/5.3L engine. The idle speed is too low. It gets as low as 430 rpm when I firsty put the tranny in drive and then the idle increases to a more acceptable level. There are no DTC's. This problem is most noticeable when you pull up to a stop. The engine rpm's get low enough to dim the lights and almoist stall the engine. The engine has 62k miles.
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http://www.hypertech-inc.com/powerstat.html
h20explorer
It's my understanding the computor is not scheduled to record and error until it misses more them 250 times.
I had spark plug wires go bad and the computor didn't record a fault. I finally had to have the service technition go for a test ride with the computor attached and have him watch it very carefully to even see the miss.
Best of luck
h20explorer
Is there more than one cam position sensor on this engine or does anyone have any suggestions on why I'm getting the low voltage reading? The engine runs great. Do you think it will leave me by the side of the road?
Thanks for any advise anyone can give me.
kcram - Pickups Host
I'm not going to complain about GMC, they gave me 2 torque converters 1 Reman. tranny 1 brand new 2004 tranny with 100K warranty, new front hubs, brake pads and rotors all the way around. Rented me a car that we had for 3 weeks and towed my truck several times for several hundred miles.
Anyway the cam sensor for the 2001 is different than the generic 2002 and newer uses that the Chevy dealer said was the replacement. Got a 2001 specific sensor from Standard [after market] and all's well for about 3 weeks and 1000 miles.
P.S. Someones mommy should tell junior to take his nap and put the computer away..
Please help.
Cheers
Steve
But, when the speed levels out at 45-50 mph and the tach shows a drop to a lower gear (while still going uphill) the truck feels like it's jerking. As soon as I give it a little gas to get out of that gear, it goes away. Also, if I stomp on the gas to get into passing gear, it goes away.
A friend says two other chevy's he knows of had this same problem and it was the fuel filter under the driver's side of the truck. While I hope this is all it is, I also hope it is NOT a transmission problem, as I tow a 27' 5th wheel. Any suggestions?? Thank you very much.
I forgot to add the fact that when the speed is between 45-50 mph, the tach is at 1500rpm. This is when it starts to jerk.
Thanks.
2000 GMC Silverado extcb 4x4 5.3l 120,000km
Problem:
I have had a major (super loud) howl/squeal coming from the belt area of my truck. It happens at idle and varies with throttle position. It used to only happen when it was cold back in November and then go away as the truck warmed up but now it is persistent every time I start it and doesn't go away. I don't know if it is "cold" dependent or if the problem has just finally come to a head as we haven't had a day over -10 for quite sometime for me to check to see if the sound goes away once it warms up.
Attempted fixes:
I started it one cold morning and let it howl. I oulled off the splash gaurd and proceded to hit all the pulley bearings I could see with kroil to see if I could find the problem bearing or pulley. No dice, it didnt stop.
Its impossible to tell where the sound is coming from with the naked ear with all the noise of a running motor. I havent taken the belt off and run the truck for a bit to see if if that stops the noise.
Side note:
The alternator went south on me about a month ago so I replaced it and the battery and belt. I figured I might as well when I was under the hood anyways. All is well with the charging system now, so I think this should eliminate the alternator and the belt from the equation.
Any ideas???
I'm going to get a mechanics stethoscope and try to pinpoint the problem. What should I be listening for and where should I be listening with the probe of the stethoscope????
Waterpump/pulletys/AC pulleys etc...???