kidunot

I have a 2002 1500HD. When it is cold outside and I crank my truck, the engine will idle high then low. Even to the point of going dead. Aftera minute or twoit runs great, no problems. I have two computer codes P0106 and P0300. Can anyone HELP? Also, my gas mileage is only 11.2. This seems a little low. I think it may have something to do with the problems I am having. Thanks.

Riccas

DTC Code: 16490
P Code: P0106
Description: Manifold Abs.Pressure or Bar.Pressure Range/Performance

DTC Code: 16684
P Code: P0300
Description: Random/Multiple Cylinder Misfire Detected


Looks like your P0300 code is creative the P0106 problem. Could be distributor or plug wires. Change the plugs and move up the chain...


-- Rick

02HD

Kidunot, have you solve the cold idle ? did riccas suggestion send you in the right direction?
I have 02 2500HD with same problem. I have added injector cleaner to the fuel, replaced the plugs. Next the wires I guess. Posted earlier today about aftermarket or oem wires, haven't decided which way to go yet. I'm not showing any codes.

Waboom!!

I work with a guy who had this problem and it was a dirty throttle body and clogged filter somewhere on the emmision/ system.

02HD

Lots of injector cleaner is passing through it now, no joy.
Looking at the intake for a leak, if no luck I'll head into the injectors.
With no codes I'm just kind of poking around.

02HD

Intake gasket has failed. OEM parts are the way to go here as aftermarket suppliers have not corrected the problem with the gasket. kidunot, look around the front of the intake, this is where most are failing. GM parts about $150.00.

04p0300

Good luck please let me know how you make out. I have an 04 silverado crew cab. Started getting p0300 code july 06 with 11,000 miles on truck
dealer has changed everthing o2 sensor ,intake man gasket then changed the intake cleaned the injectors twice ,swapped coil wires plugs .......been to the dealer 10+ times cant seem to pin point problem ..truck is at dealer now(tues) will be there at least till Fri.


Again good luck
Pat



Ps... Any one heard of succesfull chevy buyback????

shamdiel

You might also check the fuel pressure regulator. It can cause a lot of problems, at idle, when the engine is cold and it is often overlooked.

02HD

Got everthing back together Friday Afternoon. Seems to run a bit smoother but the outside tempwasin the 60s today. Hard to say until I get another cold morning. That was the only time a problem showed up. Stioll no codes,only a history of misfires. I'll keep you all posted.