Truck power loss

Asked by Aug 08, 2014 at 02:37 PM about the 1991 GMC Sierra C/K 1500

Question type: Maintenance & Repair

Loss of power my balls 91 gmc 1500
how do I give it horsepower back

2 Answers

455

I assume here that the truck otherwise runs fine, but you have lost horsepower thru loss of compression. Let me know if that is incorrect. In order to regain compression you will need to hone the cylinders and replace your piston rings at the least. You should regain some lost compression. If you want to spend a lot more money you can further increase horse power by over boring the cylinders, increasing piston size, increase carburetor and intake manifold size to allow more fuel and air mixture into the cylinder, add a performance cam to handle the new high performance pistons, and add higher flow exhaust, etc, etc.

1 out of 1 people think this is helpful.
146,215

Yet another excellent, articulate and accurate answer jonny. Only problem is if you by any chance live in Calif., don't change exhaust. It's "tampering' and will never pass smog=never be able to register. That 1991 4.3 has single port throttle body fuel injection

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Loss of power.. Won't fire up 1 answer

    Had truck scanned it said MAS was bad. Bought new one ran truck. Truck then again loses all power. Will eventually die out if I keep giving it gas.

    1998 GMC Sierra C/K 1500

    -

    Maintenance & Repair

  • I have a 1994 GMC K1500 5.7L, the previous owners switched from the standard exhaust system to headers. How do you properly change from a standard exhaust system to a header system?? 5 answers

    We are having issues with power loss and cannot find what is causing it. We are finding many different things that were disconnected and removed that probably should have stayed on.

    1994 GMC Sierra C/K 1500

    -

    Maintenance & Repair

  • Stalling from fuel loss? 7 answers

    Ok Im new to this forum but really confused about what my truck is doing. I have a 1995 GMC K1500 4x4 Z71. About 3 weeks ago my fuel pump went out on my truck. I removed the tank removed the old fuel ...

    1995 GMC Sierra C/K 1500

    -

    Maintenance & Repair

  • Speedometer/transmission problems 37 answers

    Ok my speedo is at zero and occasionally twitches but it acts like it is just in first gear what could cause it. Now keep in mind that I have already changed 2 different ecm's,3 different speed s...

    1994 GMC Sierra C/K 1500

    -

    Maintenance & Repair

  • Loss of engine power 2 answers

    I changed my air filter and my 2009 gmc. Shortly after check engine light came on as well as loss or engine power. I changed it back but I still have the same problem.what did I do wrong?

    2009 GMC Sierra 1500 SLE1 Ext. Cab LB

    -

    Maintenance & Repair

Sierra C/K 1500

Looking for a Used Sierra C/K 1500 in your area?

CarGurus has 1 nationwide Sierra C/K 1500 listings and the tools to find you a great deal.

ZIP:

Search GMC Sierra C/K 1500 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

GMC Sierra C/K 1500 Experts

#1 John Saffrahn
John Saffrahn
Reputation 120
#2 Andrew Olsen
Andrew Olsen
Reputation 110
#3 tennisshoes
tennisshoes
Reputation 80
View All

Related Models For Sale

Used GMC Sierra 1500
1,058 Great Deals out of 58,731 listings starting at $1,599
Used Ford F-150
3,217 Great Deals out of 205,088 listings starting at $1,779
Used GMC Sierra
31 listings
Used GMC Yukon
563 Great Deals out of 16,645 listings starting at $2,500
Used Ford Mustang
582 Great Deals out of 41,214 listings starting at $1,699
Used Jeep Wrangler
491 Great Deals out of 17,958 listings starting at $2,950

Used Cars For Sale