Silverado acceleration problems.
#1
Silverado acceleration problems.
Hello, I'm Aaron. I'm new to the forum and need some major help. I own a 1999 Silverado 1500 5.3 v8 with 187,000 miles. I bought it brand new from the dealer in 99. It has always ran great until recently. The acceleration is embarrassing. I noticed it almost a year ago and started looking for answers. When I press on the throttle it doesn't necessarily bog down but just simply doesn't haul ***. It takes more than 6 seconds to get to 30!! There is no torque at all....
I have a spectre air intake and a magnaflow dumped exhaust.
I used to be able to punch it and get stuck to the seat. I went to the drag strip once right before this started happening and ran a 9.8 1/8th mile. I was keeping up with turbo'd Subaru sti's and Infiniti g36's.
I replaced the MAF sensor, all four 02 sensors, new fuel filter, catalytic converter, spark plugs, intake manifold gasket, cleaned the throttle body, oil change and new air filter.
I really need some help on what could be going on. I'm tired of places scamming me for sh*t I don't need. Any help would be greatly appreciated.
~Aaron
I have a spectre air intake and a magnaflow dumped exhaust.
I used to be able to punch it and get stuck to the seat. I went to the drag strip once right before this started happening and ran a 9.8 1/8th mile. I was keeping up with turbo'd Subaru sti's and Infiniti g36's.
I replaced the MAF sensor, all four 02 sensors, new fuel filter, catalytic converter, spark plugs, intake manifold gasket, cleaned the throttle body, oil change and new air filter.
I really need some help on what could be going on. I'm tired of places scamming me for sh*t I don't need. Any help would be greatly appreciated.
~Aaron
Last edited by Aka817; January 6th, 2013 at 3:42 PM.
#4
I was thinking it was a fuel pump. The guys at NAPA told me my transmission was slipping but I know forsure that its not.
And yes my engine light is on. My ABS module has been out for many years now but it hasn't affected anything.
And yes my engine light is on. My ABS module has been out for many years now but it hasn't affected anything.
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