ktmlew

Thousand miles.

That is my assumption. Found the diagram after I posted. In the service description it says as much. Lists serviceable parts. Center support not one of them. New design isn't always good for the customer. But I guess it lasted 15 years and a couple hundred miles?

This the style of shaft.

I really want this...just don't really NEED it? If you still have it Friday the 23 I'll take it. Just too good a deal to pass on. Can keep this one at home.

These have a rear shaft with at least a 4" splined section. Not the usual slip yoke. The yoke at the rear end of the front shaft, which has the center support, doesn't have a bolt or nut retaining it. I assume this yoke is pressed on? Taking driveshaft to shop to get bearing changed Monday. Just curious if it normally presses off w/o any issues?

Have you checked the fuel to see if it's half gas or something worse?

Saw a bread truck that had broken 5 or 6 trans cases. Driveshaft was phased wrong. Sometimes it's easy to miss the simple things.

New injector spider assembly fixed fuel pressure dropping off when hot and eliminated fuel stink in vehicle. Tried to get it to leak before changing it but i had to be blazing hot. New TB adapter 'hat' and cleaned MAF, along with replaced porous vacuum hose to heater check valve. Last test drive LTFT was +6 & +3 with Trim cell @ 6. Much better. Will see what the driver has to say Monday.

Finally got back to this one. Re-did with OE timing cover. Leaked again...just wasn't getting silicone in right spot at corners of timing cover to pan junction. Finally seem to have it fixed.

It has a bunch of cables/connectors in the lid of the box. I assume what is needed was included with the Tech 2? They have been just sending them to the dealer for the flash. I would rather do it in house but it's up to the boss/owner. Not a huge difference in cost.

But you still need to connect to the internet via a cable, correct?

OK. Now i know HOW to do a flash j,ust have to get access to Internet in my work area. As i understand procedure, you retrieve info from vehicle with Tech 2, connect Tech 2 to internet/GM web site, download file, connect to vehicle and load flash.

OK. Intake snorkle is junk. Clips on front are bent, so it flops around. Amazing how much dirty sludge was inside it. Yuck. One of the clamps on the intake hose was messed up so wasn't really tight. RH valve cover grommets both junk. Grommet for oil filler tube is missing lower half...it was just sitting on the cover. All after MAF air leaks. You can't tell about some of this stuff until you start disassembling shit...to-be-continued. Had noticed a strong fuel odor. Re-checked fuel pressure. 62PSI at KO and drops like a rock when pump stops. Oh crap...i know what it is...fuel pressure regulator leaking or a dribbling injector. Some disassembly required. More to follow. Ordered some parts to seal the intake & crankcase ventilation. Apparently the internal fuel leak was being partly offset by the after MAF air leaks? I had disconnected the MAF electrical connector and driver said it made no difference. Both times I worked on it previously, the two pilots were standing there waiting on me...I hate that. One was actually sitting in the passenger seat while i put the plug wires on. i finally ended that deal. Told supervisor they had to go. Turns out the freshly installed water pump, I didn't do IT, is leaking at the block to pump gaskets. Red silicone on paper gaskets tend to jack the material apart. I don't use any sealer on paper gaskets. Just two long studs to hang gasket & pump. put other bolts in and git-er-done. So I believe Fred pretty much nailed this one right out of the box! Will know for sure fairly early Monday.

Cool. Have Tech 2 with Can De module. Will do more research.

Can you do this with the Tech 2 or do you have to use the MDI? We don't have MDI. I believe the programming is available for 55 bucks for 2 days. Replaced trans today. Hate to have to tow it to dealership.

Had too many other fires to put out today. Driver said truck ran first half of day just fine. Then on return trip acted up a couple times once at higher temperature. Says it's just trying to get past about 20 MPH that is does it. It stumbles and pops through the intake then goes. I unplugged the MAF, showed him what I had done and shipped him. Didn't hear from him this afternoon. Will see what he says tomorrow morning. I have 90+ trucks/vans to deal with so gets pretty busy at times.

Thank you! 29 years, that's a really long time! I worked at my dad's shop from the age of 12 till 19, then after graduating HS, went to work at a dealership. Been a constant struggle ever since. Just started a fleet job last month. Pretty much like working for myself but with OVERTIME! I was never a great flat-rape tech. Just found the whole idea stressful. Wish i had worked harder at moving into the parts side of things 20 years ago. Too late now. 10 more years of busting my butt then off into the sunset! Good luck dude.

I AM just trying to fix the stumble. It DOES act like a skewed MAF. Haven't seen any data that looks out-of-range other than the Fuel Trims. They replaced the stock fuel filter with a spin on mount. New filter. I will open & clean the sensor the MAF tomorrow. Will record some data tomorrow if I get to keep the truck. It does seem to get worse the longer it runs, Heat related to an extent.

Have been busy with other stuff. Truck is running so as long as it does I'll just have to wait till i can catch up with it.

Will have to record it. The stumble is pretty intermittent but LTFT is consistently elevated above 1500RPM. I might try the MAF off my truck as a test part. Can't get my piece of crap Hantek scope to work. It shuts the usb port down. Junk but it was cheap. $100.00 wasted. Would like to get a Pico but not in the budget till after first of year. I guess i can use the PLOT function of the Tech 2 though? Hmmmm? Meant to try it unplugged but forgot. The stumble is very intermittent but I suspect if i get the LTFT down the stumble will be fixed. Feels like a lean stumble. Need scope damn it.

Will have to record it. The stumble is pretty intermittent but LTFT is consistently elevated above 1500RPM. I might try the MAF off my truck as a test part. Can't get my piece of crap Hantek scope to work. It shuts the usb port down. Junk but it was cheap. $100.00 wasted. Would like to get a Pico but not in the budget till after first of year. I guess i can use the PLOT function of the Tech 2 though? Hmmmm?

When you say "take them apart" you mean just remove MAF from intake hose and spray it from engine side, right? Cleaned it that way this morning. Didn't get to drive it until this evening. No joy. Seeing LTFT of 12-14% under load when warm, LTFT 4-7 during warm up. That indicates a lack of fuel to me more than a vaccum leak issue. Vaccum leaks should elevate STFT and correct at higher RPM. I'm inclined to believe it's an injector issue. It runs fine until up to temp, about 10 minutes from start up. Stopped at a stop sign and it idled ragged. When i pulled away it missed and stumbled like it was running on 6 cyls for about two truck lengths then took off. Really hard to duplicate, plus driving and trying to watch data is tough. Guess i need to do a recording and see if anything stand out. Really wasn't expecting it to "misfire".

Thanks. My technical info is Alldata DIY which costs me $16.95 for each additional vehicle. I have 2009 & 2011 G Van so far. Need to pony up for the 00 G van. Found the data charts for the 09. It indicates LTFT +/- 10 % as "normal". I was suspecting intake vac leaks. Haven't had this one open yet to see if the injector has been updated. Need to get a new fuel pressure gauge and a smoke machine. I rarely get access to these trucks for more than an hour at a time. Heat shields were missing from RH exhaust manifold so it ate the plug wires. That melted the converters down. Scrounged the shield off a junker. Opinions on injector flushing & top engine cleaners? I'm not a big fan of mechanic in a can.

I've always figured anything above 7-8 percent was something to be concerned about on other vehicle makes. What is the number you guys would use on one of these? Truck runs OK but seems a bit flat to me from 2300-3000k at 35-45% load. What is the number that kicks a lean/rich code? This one is running +7 to +11,<135-140> at the above throttle/load. Graphed o2's with Tech 2 and nice sine wave, Truck has 237K miles. Just replaced cats and complete tune-up. Has a screw on fuel filter like a diesel. Fuel pressure on my junk gauge was 55psi but it always seems to read 5-7 lbs low. On the too replace list. Do these respond well to cleaning the MAF? What about injector flushing? I'm being really picky as i want to build a database so i can possibly head off any breakdowns.

Mine got weird on Chrome too. Had to use the kill button to shut it down. Rolled it back to Win 7 Home. I'm done with it. Tried it twice and had major glitches within 2 days both times.