It starts fine, if I stay with it, negotiate the gas pedal for a few seconds it wil usually keep idling smoothly. Until I put it into gear?

Asked by Domn8or Mar 21, 2017 at 03:31 AM about the 1995 GMC Sierra 2500 2 Dr C2500 SL Standard Cab LB

Question type: Maintenance & Repair

(1995 GMC Sierra 2500 Pickup, 305 V8, Automatic Transmission, rear wheel
drive, 85,000 miles) Once in gear it will normally require me lightly pumping
the gas to keep from dying. Too much gas and it bogs down and requires
additional gas pedal work. it doesnt want to pick up speed from a stop and
after I get it past the bogging down point I can floor it and it will sound like i
floored it but only accelerates at 50% of the speed it would normally. When it
shifts gears it drives fine until i come to a stop again. After 10 minutes, the
engine warms up and it isn't as bad.  I have replaced the oxygen sensor,
spark plugs, fuel filter, air filter, fuel additives to clean any and everything and
I have run through 3 tanks of gas, it is still messed up. It gave me trouble
codes #13 & #44 I changed the Oxygen Sensor & cleared the codes. It gave
me trouble code #44 a few days later.

3 Answers

223,915

Running lean. Take the TBI off and check the base gasket, could be bad, snug up the intake manifold bolts, and check the vacuum lines to see if the connections are cracked.

1 people found this helpful.

Thanks for responding. I have replaced the oxygen sensor, spark plugs, fuel filter, air filter, PCV Valve, Distributor Cap and rotor so far. It ran a little better than yesterday but still has the problem. Yesterday is was pretty bad. During the rain. I purchased a new base gasket for the TBI and will change that , snug up the manifold bolts ans recheck the vacuum lines for cracks tomorrow. Thanks again

Your Answer:

Sierra 2500

Looking for a Used Sierra 2500 in your area?

CarGurus has 2 nationwide Sierra 2500 listings and the tools to find you a great deal.

Postal Code:

CarGurus Experts

  • #1
    Rowefast
    Reputation
    180
  • #2
    Gene Arnett
    Reputation
    170
  • #3
    mikeatpriestlake
    Reputation
    70
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
148 Great Deals out of 7,258 listings starting at $3,950
Used Ford F-150
321 Great Deals out of 14,968 listings starting at $1,712
Used Dodge RAM 2500
23 listings starting at $9,975
Used Ford F-250
6 listings
Used GMC Yukon
16 Great Deals out of 929 listings starting at $1,225

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.