Question about 1994 GMC Sierra

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Replacing timing chain in 94 throttle body 2 wheel drive 4.3

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I would check to make sure its the timing chain they normaly don't go first on that engine. The crank shaft pisition sensor or the disturbtor shaft can look like the timing is the problem.But if you have broken a tooth on the gear or something you need to remove the radaitor the water pump the timing cover you can unbolt the upper gear the lower one you have to pull. Set the engine up so # 4 cylinder is at the top of the compression stork. install the gears so the mark is down on the upper gear and up on the lower gear and they line up in the middle # 4 is the front right hand side when faceing the engine from the front and the vehicle be on correctly timed.

Posted on Jan 02, 2011

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Posted on Jan 02, 2017

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1 Answer

Correct code P0504?


What Colorado do you have ? 2 wheel or 4 wheel drive ? Sport ,sport LS 3.5L , Z71, Z71 LS. etc. what size engine ? an does it have electronic throttle control ? I have factory service info an it is not showing that code .
DTC P0506

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0506 Idle Speed Low
DTC P0507

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0507 Idle Speed High
Cleaning the throttle body mite take care of it !
Cleaning Cleaning An Electronic Throttle Body Safely

Jan 31, 2015 | 2005 Chevrolet Colorado

1 Answer

94 s10 4x4 4.3L TBI. rough idle and power loss


IAC valve @ throttle body regulates the air/fuel idle. its right in front of the throttlebody, replace it, MAP sensor works together with IAC, both could be your problem. everything else you did is good, I feel these items are necessary to put you back in bussiness, just do it !!!

Jan 13, 2013 | 1994 Chevrolet S-10

1 Answer

Driving car and just died ignition module and coil packs are good were would u look next i was thinking crank sensor


May be the timing chain. I had an 87 that did the same thing. See if it will start by squirting some starting fluid in the throttle body to make sure it's not a fuel issue.
You can check for spark by pulling a plug wire off, inserting any spark plug to the wire, and holding the base of the plug to a metal part of the engine. You should see the plug sparking when the engine is cranked.
An improper but effective way to check for compression is to disable the ignition to avoid backfire, removing the boot to the throttle body, and holding your hand over the opening of the throttle body. If the timing chain is good and you've got any compression, you will feel suction on your hand. If the chain or gears have failed you will feel suction followed by blowing out of the throttle body.

Jan 06, 2011 | 1988 Pontiac Bonneville

1 Answer

The dakota i have is a 94 with a V6 i drive down the road and it has no power and it back fires through the throttle body. the the check engine light blinks and it dies. after a few mins it starts what do...


it sonds like your engine timing has moved, have you replaced the head gaskets or some mayor engine repair on it?? if you do you must miss a toot on the engine timing chain, make sure you have the time set to the exact timing points.

Dec 17, 2010 | 1994 Dodge Dakota Club Cab

1 Answer

High engine idle 94 Mercury Cougar


replace throttle body gasket. first check to see if carbon has built up around the throttle valves in throttle body if so remove and clean it with throttle body cleaner.and a old tooth brush. besure to remove all electrical components or any thing that plastic or rubber the cleaner will destroy it.

May 18, 2009 | 1994 Mercury Cougar

1 Answer

94 chevy 5.7 2 wheel drive


computer wiring could be bad /computer bad..should be spitting codes....tired motor / internal damage ? timing chain/gear set up improper?

Nov 09, 2008 | 1988 Chevrolet K1500

1 Answer

Timing


please specify if your s-10 is pick up? or blaser, or 2 or 4 wheel drive, also engine size or at least how many cilinders the engine has, thank you

May 28, 2008 | 1994 Chevrolet S-10

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