Question about 1998 Chevrolet K1500

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98 1500 5.7liter intermittenly loses power under load @ highway speed-- shakes -- then corrects itself. otherwise runs like a watch

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  • leishakribs Nov 24, 2008

    1995 Tahoe loses power when going up hill. Its fine running on flat or down hill areas.

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I have found that this is caused by dirty valves or weak valve springs .... does the check engine light come on

Posted on Dec 09, 2008

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1 Answer

Loss of power


I can think of two possibilities.
1) The air mass meter could be defective, or covered in dirt, and not providing the right fuel mix under a load heavier than normal driving.
2) The monolith in the Cat may be breaking up and blocking the exhaust system, which would again be more noticeable under load.
Both possibilities are usually accompanied by reduced acceleration and a drop in performance but when the problem starts these things may not be detectable.

Mar 25, 2014 | 1990 Mercedes-Benz Mercedes Benz C Class

2 Answers

Rear of car shakes at highway speeds


tires not balanced or needs alignment

Aug 02, 2010 | 2000 Nissan Maxima

1 Answer

94 jetta 2.0 manual tran. engine stopped running at highway speed///have checked computer //fuel pressure regulator//engine management relay/// have fire on the plugs///have fuel pressure in the...


Sounds like the fuel filter. It would indicate the correct pressure at idle or maybe even revving. Once the engine is put under a load (highway speeds) it begins to choke. Try replacing the fuel filter.

Jun 29, 2010 | 1994 Volkswagen Jetta

1 Answer

At low speeds the steering wheel goes left and right by itself. At highway speeds it viabrates


If it's shaking left and right and shakes faster the faster you go i wood say it's slipped belts in the front tires.Hope this helps.

Feb 25, 2010 | 2001 Chrysler Town & Country

1 Answer

My jetta was intermittenly losing power but would correct itself. This morning the dash lights came on and the car ran really rough. I had a a hard time getting up to speed. When I turned it off it was...


your altenator is bad or your battery is shot. Take you car to your local Auto zone parts store and they can run a chk on the battery for you for FREE.

Oct 14, 2009 | 2003 Volkswagen Jetta TDI

1 Answer

2003 B3000 v-6 idles rough but does not stall and runs well at highway speeds


Try turning on the ac or turning the steering. The increased load on the engine should lower the the rpm. If the Idle Air Control valve is working correctly it should sense the load and maintain the rpm or even increase it a bit.. Also this should be cover under warrenty.

Jul 30, 2009 | 2007 Mazda B3000

2 Answers

2004 Grand Am acts like it's out of gas when it's not.


It almost sounds like you are losing spark at times, and not fuel. i guess the cheapest place to start is to change plugs and wires. Pay close attention to the gap on the plugs. Another thing could be the idle air control valve, or water in your fuel.

Jun 12, 2009 | 2004 Pontiac Grand Am

1 Answer

Engine power seem a miss when demand is needed


check your fuel pressure good chance that there is enough fuel getting there under light load but not enough under heavy load it should not drop below 45 pounds at WOT ( wide open throttle ) while driving under a load if it drops to low good place to start at the pick up screen in the tank or the pump itself

Apr 13, 2009 | Ford E-250 Cars & Trucks

2 Answers

When getting up to highway speed (beginning around 45mph) the car begins to shake and lose power. The check engine light comes on. Sometimes it will keep going an get past the issue and be fine, other...


has the car been eating anti-freeze? have you noticed any smoke from the tail-pipe? if the problem hasn't been found during a routine check, it's time to look deeper. where i'm going with this is a headgasket. keep an eye on your coolant level.

Sep 19, 2008 | Subaru Legacy Cars & Trucks

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