Question about 1989 Chevy C/K Pickup 1500 Catch-All Carpet Floor Mats

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89 chevy cheyenne, 4.3L manual 5 speed, shaking at idle but not a skip

I have checked for vacuum leaks, ignition all new, compression good on all cylinders, replaced harmonic balancer, replaced IAC valve, cleaned EGR valve, cleaned throttle body, timing is right on spec. HELP!!!

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  • 338 Answers

Did you check for a torn motor mount?

Posted on Mar 19, 2014

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1999 chevy van, 7.4 v8 eng. surges and wants to dye out at idle, otherwise ok. possible causes?


fuel line, with that you most likely got ( gross, oh goodness, eww, yucky) sludge in the tank that is most likely in the lines as well. did the van sit for a long time. if so the first thing u do is drain the tank an put new fuel in it so sludge (dirt) don't happen. hope i helped good luck

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Okay I was driving my 1995 chevy Cheyenne 4wd today and it just started to knock really badly and now it won't pick up speed but idles fine


check the engine vacuum at idle. it should be 20 inches of vacuum. if not the catalytic converter may be clogged up.

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What can cause my 1997 chevy cheyenne truck to smoke alot? Also it shakes alot when im parked but run good when i drive, can it be the idle control sensor that is the problem?


Fuel pressure regulator diaphram is probably ruptured.
Pull vacuum line from pressure regulator and if fuel is present, the regulator needs to be replaced.

Mar 24, 2014 | Chevrolet 1500 Cars & Trucks

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Chevy Cavalier Random Misfires - Rough Idle


Try this:
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-Is it fuel injector...? Then check its resistance of each injector when it's cold. If it's not within its specification then replace new one

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Why does my 89 justy die when i slow down?


It could be any number of things. The MAP sensor is bad, a severe vacuum leak, the fuel filter is plugged, it needs a tune-up like new plugs & wires etc., the fuel pump is weak or leaking if its a manual one. If the car runs rough at idle have a vacuum test done also, while the car is running at night, open the hood and see if the plug wires are arcing as you will see what looks like small lightning sparks around the wires. The worst case scenario is the piston rings are shot causing poor compression. A repair manual is usually available at the local auto parts store, or shopping center like Wal-Mart and Meijer.
I wish you the best of luck.

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1995 chevy k1500 4.3 5 speed 150,000 stumbles at idle and while driving slow, and even at higher speed while maintaining my speed it will go erratic and smokes black. Have changed map sensor and ignition...


Did you change the TPS - throttle position sensor . Have you check for vacuum leaks . O2 sensor ? videos on youtube on how to test !
GM OBD Trouble Code 44 4 & 6 cylinders ? head gasket Do a compression test on those two cylinders .

May 01, 2017 | 1995 Chevrolet K1500

2 Answers

91 S10 rough idle, stalling ALDL problems


Make sure there is no vacuum leaks.


Vacuum leak at intake manifold and vacuum hose.

Bad Idle Air Control Motor (IAC)

Low compression (170 psi + is OK)

Start cleaning and repair these trouble spots and see is there any improvement.

====

For more advance DIY'er then you may try this.

Use a can of Berryman carburetor clean to locate the vacuum leak.


SEE SAMPLE PICTURE HERE


This is a 20-30 minutes job.

Vacuum leaks can occur in following locations.


Intake manifold AND/OR vacuum lines.


Intake manifold is not accessible unless the engine head if off.

You can still check the potential leak by spraying some Berryman near the intake manifold.

Listen for rpm increase after you introduce the Berryman (FUEL) at idle.


Do the same starting from the brake booster unit (the round unit) on the drive side fire all.

Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.

Get a friend to HEAR the RPM increase or monitor for RPM on the tech.

DO NOT AIM the Berryman into any heat source.


PLEASE RATE my answer if it is useful to you.

Dec 17, 2009 | Chevrolet S 10 Cars & Trucks

1 Answer

Why is my 1994 Chevy S10 Blazer lugging? motor shakes and lugs.


Could be vacuum leak or bad ignition wire(s).

I had a similar problem on my "93 Ford probe. The engine idled pretty rough with shakes, Turned out to be a head gasket leaking engine coolant into the cylinder during low rpm's. At fast rpm's it was fine becuase the internal cylinder pressure was greater than the hot coolant pressure & would prevent the coolant from leaking in.

A friend has the same problem with his "94 Blazer 4.3 L, throttle body injection, manual tranny. He hasn't fixed it yet, It started a few weeks ago & is getting worse. His gets a fast idle with hiccups which causes the engine shake. He already checked the EGR valve. He also has a severe exhaust problem, Not oilly but very gray & terrible smelly, but only when the fast idle problem happens. THis fast idle hiccup problem starts when the engine is warmed up.

Nov 19, 2008 | 1994 Chevrolet S-10 Blazer

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