Question about 1998 Chevrolet K1500

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1986 chevy 1/2 ton pickup . When I apply the brakes, the engine idles roughly and a loud hissing noise appears. The truck does not stop well.

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Your Booster is shot more than likely. located on the drivers side firewall.

Posted on Aug 11, 2008

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What are symptoms for bad brake booster on 1998 Dodge Ram 1500?


Hard brake pedal when applied with the engine running. A quick test for the vacuum assist booster is to shut off engine, pump brake pedal 3 or 4 times and hold on the last pump, start engine and see if pedal drops a bit....if you detect a problem with booster you should check for adequate engine vacuum supply to booster when idling . You can sometime hear a hissing or air leaking when applying brake pedal with engine running if booster is defective

Jul 15, 2014 | 2001 Dodge Ram Pickup 1500

1 Answer

My 2007 Chevy Silverado loses power when I come to a complete stop no engine lights appear but if I turn off the truck the problem goes away for awhile .


Loss of power, but no mention of rough or inability to idle (including stalling). If those additional symptoms are part of the problem, check for a vacuum leak to the intake. Listen for hissing or sucking noises near air hoses. Look for loose, cracked, or broken air hose connections. Check PCV valve...Cheap to replace, could be sticking, then loosen after truck sitting with engine off. A vacuum leak will not give any light indications, and vehicle will seem to run normal when applying gas, but will want to stall or run rough (or want to stall) when at idle or sometimes when taking foot off gas when slowing down.

Oct 08, 2013 | Chevrolet Silverado Cars & Trucks

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Broken brake line on 1990 chevy 4x4 pickup (K1500) broke and drained master cylinder. Front disc brakes/rear drum brakes. ABS system. Once brake line fixed what is the bleeding procedure that must be...


1990 Chevy 4.3 l engine runs rough at idle half the time-- sometimes it's OK, other days it's rough and can smell raw gas, as tho it's running rich... any ideas?

Nov 27, 2010 | 1990 Chevrolet K1500

1 Answer

Vehicle: 1986 toyota "1 ton" pickup truck w/EFI L4 22-R engine. 245k miles After doing an ignition tune-up (plugs, wires, rotor, dist. cap, etc...), my rough idle issue has not subsided. Q: what should I...


I had a 1987 carburator truck and you are correct, dirt was the main issue. However, I think you may have the same issue, but in a different way. I would look at your fuel filer for starters and then run a can of injector cleaner through. If that does not help, maybe look at some new injectors. If you have 245K on this truck, I think your injectors may be tired and need to be replaced. It would appear that you have taken care of all the other issues. Another posibility is the throttle position sensor, (maybe)

Hope this was of some value.

Todd.

Mar 17, 2010 | 1987 Toyota Pickup

4 Answers

Rough Idle on my 2004 Chevy Silverado


I would try some concentrated injection cleaner look over tune up

Mar 10, 2010 | 2004 Chevrolet Silverado

1 Answer

Constant backfire on deceleration 88 chevy 4.3 V 6


Check for exhaust leaks. Esp Leaks toward the front of the car. Hold your hand over the tail pipe using a rag and see where the loud hissing noise comes from. Repair the leaks and I bet the backfiring goes away

Good Luck

Feb 09, 2009 | 2000 Lincoln Town Car

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