i have a 2001 gmc savana 3/4 ton 5.7 vortec, i am having problems with a rough/low idle and it dies under load and has no power. i have replaced the fuel pump, fuel filter, spark plugs wires, plugs, rotor, cap, air filter, MAF sensor, TPS sensor, idle air control sensor, EGR valve. i am out ideas please help. By the way i have NO codes.

Asked by May 25, 2014 at 12:33 AM about the 2001 GMC Savana Cargo G3500 Cargo Van Extended

Question type: Maintenance & Repair

i have a 2001 gmc savana 3/4 ton 5.7 vortec, i am having problems with a rough/low idle
and it dies under load and has no power. i have replaced the fuel pump, fuel filter, spark
plugs wires, plugs, rotor, cap, air filter, MAF sensor, TPS sensor, idle air control sensor,
EGR valve. i am out ideas please help. By the way i have NO codes.

1 Answer

9,575

Sounds like could be low compression on cylinder,remove each plug one at a time and test with a compression checker,if you dont have one you can rent one a your local parts store.Remove fuel pump relay to keep engine from cranking and test each cylinder ,They should be at least 45 to 50 pounds and hold it.have someone to turn car over while you test the pressure in each plug hole. Remeber it must hold the pressure.if you find one that is low pressure you may have to have head work done. It sounds like you have done every thing else you can do.Best of luck to you,,

Your Answer

Add photo

Related Questions

  • Gmc 3500 savanna oil pressure maxed out 2 answers

    Dipstick almost empty. Remanufactured motor with 300 miles

    2005 GMC Savana Cargo G3500 Cargo Van

    -

    Maintenance & Repair

  • What does "Harness Code VAY" mean?? 1 answer

    I am trying to buy a fuel pump assy online, I found some that state: w/Harness Code VAY for 98-02 GMC Chevy Van. What does this this mean?

    1999 GMC Savana Cargo G1500 Cargo Van

    -

    Maintenance & Repair

  • rough idle, stalling, loss of power. 226 answers

    o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. It will run normal on occasion but only lasts about 45 seconds or so. I don't think its the torqu...

    1995 GMC Sierra 1500 K1500 SL 4WD Extended Cab Stepside SB

    -

    Maintenance & Repair

  • I need help with a 1993 gmc 5.7L tbi. 24 answers

    Ok, so i have a 93 gmc suburban. I just put a new engine in. It has flat top pistons running about 9.2 to 1 compression and an rv cam. The truck itself has about 282000 miles on it. I am having an...

    1993 GMC Suburban K1500 4WD

    -

    Maintenance & Repair

  • I unplug my coolant temp sensor and my car runs better than with it unplugged, why? 10 answers

    I've replaced the coolant temp sensor, thermostat, fuel filter, vacuum hoses, checked the fuel pump, replaced the map sensor, idle air control valve, o2 sensor, cleaned the tbi and my car still has a ...

    1993 GMC Vandura G25

    -

    Maintenance & Repair

Search GMC Savana Cargo Questions

GMC Savana Cargo Experts

#1 archiehill
archiehill
Reputation 50
#2 Rowefast
Rowefast
Reputation 30
#3 elliottsplumbing
elliottsplumbing
Reputation 20
View All

Related Models For Sale

Used GMC Sierra 2500HD
126 Great Deals out of 13,986 listings starting at $2,650
Used Chevrolet Express Cargo
52 Great Deals out of 14,156 listings starting at $2,500
Used GMC Savana
6 Great Deals out of 1,572 listings starting at $2,995
Used GMC Sierra 1500
897 Great Deals out of 64,570 listings starting at $1,500
Used Ford E-Series Cargo
80 Great Deals out of 3,078 listings starting at $600
Used Chevrolet Silverado 2500HD
330 Great Deals out of 26,536 listings starting at $2,500
Used Chevrolet Express
76 Great Deals out of 5,761 listings starting at $2,288
Used GMC Sierra 2500
162 listings starting at $2,400
Used Chevrolet Silverado 1500
1,984 Great Deals out of 160,612 listings starting at $1,850
Used Ford F-250 Super Duty
402 Great Deals out of 47,703 listings starting at $400
Used GMC Sierra 3500
5 Great Deals out of 243 listings starting at $7,788
Used Ford Transit Cargo
74 Great Deals out of 19,428 listings starting at $13,499
Used GMC Yukon XL
261 Great Deals out of 11,816 listings starting at $2,400
Used Chevrolet Astro Cargo Van
136 listings starting at $4,995

Used Cars For Sale

2017 GMC Savana Cargo For Sale
3,283 listings starting at $23,345
2016 GMC Savana Cargo For Sale
673 listings starting at $18,983
2015 GMC Savana Cargo For Sale
226 listings starting at $18,995
2014 GMC Savana Cargo For Sale
93 listings starting at $13,462
2013 GMC Savana Cargo For Sale
43 listings starting at $10,995