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BadKarma New Member

BadKarma

Posted
Posted

Fellas,

I'd like to humbly welcome myself to your board by saying what's up and I'm happy to find a place where I may be able to not only ask headscratching questions but also answer a few.

I've got a '00 2500 Ext Cab 4x4 6.0l/5sp. I've had it for a couply years, bought it as a repo. Got a great deal on it. I'm happy.

Since I've had it, Ive had a slight vibration in the rear driveline that I couldn't really nail down.

New tires, wheels, balance. Rebalance, rotate, rebalance...etc.

I went as far as taking the driveshaft off of the truck and even had that balanced.

A fella was nice enough to run into the back of me while my truck was parked at work so when I got the ok from his insurance, I took it into my local Chevy house.

Another day, I'll post the screwed up job that they did on me, but long story short is that they replaced the entire manual trans, clutch, flywheel. (91k miles when they did it and it legitimately was ready).

Anyhoo, the vibration seemed to go away. Probably moreso because my head and my wallet were both telling me that I had a new truck now...

I can now still feel the vibe around 73-78 mph only. It goes away with speed but really sucks when I can't go faster or have to stay right at that speed.

Another problem that has developed lately is that the truck has a hard time starting. I've replaced the fuel filter every 15k miles since I've had it and even had the fuel system cleaning performed twice on it to assure clean injectors.

I am a mechanic by trade and work on several systems, but this one is appearing to be an electronic one from what I gather. I've disconnected the TPS and tried running it that way to see what will happen and it really doesn't change the way that it starts or idles.

What it is doing (I guess describing it would be best...duh!) is turning over several times before kicking on and igniting. There are times I swear that I've been holding the key in the start position for over 20 seconds. That just seems way too long for any FI car. Also, when I drive it (more noticable when I've been on the highway at speed for a long time and they slowing down) and downshift the idle takes off up to 3500 rpms sometimes and stays there while I have the clutch depressed. It doesn't always do this and that's why I'm guessing that it's got to be a bad fuel pump, sender, or Throttle Position sensor.

If there are any studs in this department that could give me their $.02 or direction, I'd be aprreciative.

Again, thanks for your time and I look forward to meeting with you at some point or another on the board here.

 

Respectfully,

Ivan

Shaners Senior Enthusiast

Shaners

Posted
Posted

Welcome to the forum!!!

 

Your hard start problem could very well be your fuel pressure regulator. A quick search on this board will show you that this is a fairly common problem that causes hard starting.

MS3DALE Senior Enthusiast

MS3DALE

Posted
Posted

Welcome to the board :flag: And I would have to agree with Shaners about the fuel pressure regulator,I work at a GM dealer and we have replaced many on the '99 to 2000 4.8-5.3-6.0 engines on these trucks,The part number you need is 12574986 and lists for $62.30.

GM changed the design mid-year 2000 on these and we haven't seen a problem since. :cheers:

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