01 Tahoe fluctuating oil pressure and sluggish engine (FIXED)
UPDATED TODAY JULY 29, 2013
I just bought a 01 Tahoe 5.3l with 160000 miles. When I bought it, it had the P0446 CEL on so I know what to do to fix that when I get a chance, but yesterday I was towing my trailer (24ft 6000lbs) at about 50MPH and the CEL started to flash for a couple seconds, so I took my foot off the gas and slowed down a little and the CEL stopped flashing this was the only reason I knew something was wrong with the truck as there was no hesitation, etc. I get the trailer home and look at the wires and plugs and notice that they are original so I change them out with NGK wires and new plugs. I did notice that cyl 6 and 8 had white tipped plugs while the others were all that nice golden color.
This morning when I start the truck and start driving I find the truck is slow to respond and somewhat sluggish. I WOT it and the hesitation goes away. I look at the oil pressure gauge and it's now about 8psi higher at idle then it was before I did the plugs and wires. I start driving and the pressure continues to climb in conjunction with amount of gas I give it (this is normal I know), but when I go WOT the gauge is almost ******* at 80PSI and under normal accell the gauge goes up to 70psi. This never happened before I did the plugs and wires it was always about 10psi less.
What is happening??!?! I'm at a loss. No oil leaks, new plugs and wires, oil was changed about 300 miles ago and is full and golden brown.
Any suggestions for me as I need to tow my camper to the lake this weekend.
Thanks in advance!
UPDATED TODAY JULY 29, 2013
I just bought a 01 Tahoe 5.3l with 160000 miles. When I bought it, it had the P0446 CEL on so I know what to do to fix that when I get a chance, but yesterday I was towing my trailer (24ft 6000lbs) at about 50MPH and the CEL started to flash for a couple seconds, so I took my foot off the gas and slowed down a little and the CEL stopped flashing this was the only reason I knew something was wrong with the truck as there was no hesitation, etc. I get the trailer home and look at the wires and plugs and notice that they are original so I change them out with NGK wires and new plugs. I did notice that cyl 6 and 8 had white tipped plugs while the others were all that nice golden color.
This morning when I start the truck and start driving I find the truck is slow to respond and somewhat sluggish. I WOT it and the hesitation goes away. I look at the oil pressure gauge and it's now about 8psi higher at idle then it was before I did the plugs and wires. I start driving and the pressure continues to climb in conjunction with amount of gas I give it (this is normal I know), but when I go WOT the gauge is almost ******* at 80PSI and under normal accell the gauge goes up to 70psi. This never happened before I did the plugs and wires it was always about 10psi less.
What is happening??!?! I'm at a loss. No oil leaks, new plugs and wires, oil was changed about 300 miles ago and is full and golden brown.
Any suggestions for me as I need to tow my camper to the lake this weekend.
Thanks in advance!
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