Question about 1998 Chevrolet K1500

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Engine detonation on 98 k1500

I replaced intake gasket, idle air control valve, spider injection, and distributor. now i have a detonation issue under any kind of load.

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  • 103 Answers

What do you call detonation you are talking about explain detonation.

Posted on Apr 19, 2013

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SOURCE: Service Engine Soon Light and Rough Idle (Below 1200 rpms)

do you get check engine codes?..have you done a leak down test and compression test to determine mechanical engine health?

Posted on Oct 07, 2008

  • 1 Answer

SOURCE: 95 GMC Jimmy 4.3l W vin rough idle

My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.

Posted on Dec 10, 2008

outdoorsman5
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SOURCE: Vaccum hose diagram for 97 chevy tahoe 5.7 liter

I have the diagram you need. If you send me your email I will scan it off and send it to you. outdoorsman592003@gmail.com

Posted on Sep 12, 2009

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SOURCE: 98 Chevy Tahoe 5.7 liter engine cuts out and

Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?

Posted on Dec 18, 2009

  • 4088 Answers

SOURCE: p300 engine code replaced coil,wire,control module

P300 reads as: 'random/multiple misfire' which usually means all cylinders are misfiring intermittently. Suspect a defective crankshaft/camshaft position sensor or weak fuel system pressure. If only one cylinder is misfiring (check by sliding a test light probe [make sure the ground lead is clipped to the engine securely] between each plug wire boot and it's wire at the distributor/coil block to short out that cylinder's spark. The dead cylinder will not change when it's spark is killed. Try a new spark plug first, then test that cylinder's compression if no help. You could have a bad valve. If the old plug was wet with fuel, the injector is probably doing it's job. When this cylinder runs again, that may clear up the backfire problem. Hope this helps!

Posted on Apr 04, 2010

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When idleing once in a while it starts running rough and shaking truck, 1998 k1500 350. no engine light. when i gige it gas it smooths right out. engine seems like its a little louder than normal.


Here is the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours.

To correct this problem Buy a can of throttle valve cleaner (it is made by CRC) from the local auto parts store, NEVER USE CARB CLEANING SPRAY, IT DESTROYS THE ANTI-STICK TEFLON COATING, spray it into the air intake through the throttle body of the engine until you have used about half the can, you will need to hold the idle up while you do this, it will try to stall, after this shut the engine down and disconnect the Negative (-) battery cable for 5 minutes. The intake is now clean, if you continue to have the idle speed control problems you may need to seek the help of a professional.

Feb 13, 2012 | 1998 Chevrolet K1500

1 Answer

High idle after engine is warm. nothing is sticking with linkage.1992 chev k1500 5.7


Make sure the idle screw was not turnned causeing tps sensor to read over the spec limit, the next then is to make sure the idle air control valve is working , a bad valve will cause this problem and last is the stepper motor that controls the idle. some of these around this year used steeper idle control motors instead of idle air control valves and in turn the stepper motor is bad it will hold the throtle plate open to much causing the tps reading to be wrong triggering the engine light to come on. the steeper motor will be boltted to side of the throtlebody and theres a small arm to the throtle linkage. i will enclose a stepper motor picture and an idle air valve to show you, but this sounds like the tps is out of range due to this. the last thing is to make sure there are no vacuum leaks, spray crab cleaner around throtlebody base gasket and also the intake mounting gasket and see if the idle changes is so theres a vac leak in that area. good day. okay just did a little research and this truck does have a idle air control valve, the picture is encolsed and is screwed into throtlebody, check that and for vacuum leaks, make sure tps is good sometime it will test good when testing and go bad when it wants, you could have a bad tps and idle air control valve also.11_27_2011_9_27_54_pm.jpg

Nov 24, 2011 | 1992 Chevrolet K1500

2 Answers

In my 2000 Saturn SL1 I am experiencing very high idle (2000 rpm warm - higher cold). I have cleaned the throttle body and the idle air control valve with no improvement. What next, replace the idle air...


You could try replacing the idle air control valve but I would obtain one from a local salvage yard, its cheaper and you are not certain if thats the problem, another thing i would check is your intake manifold gasket where it meets the cylinder head, if tha gasket is cracked or leaking it will allow excess air to enter the engine and make it idle higher, the easiest way to verify this is get a can of carb and choke cleaner and spray it all around the intake gasket area, if the engines idling characteristics change drastically then the gasket is bad and needs to be replaced if theres no change in the idle I would start looking for vacumm leaks and the idle control valve issue, which you specified.

Jul 03, 2010 | 2000 Saturn SL

1 Answer

My 350 idles rough at an idle but runs smooth above idle and it pings under a load. The timing is right on.


fuel injected?-was the engine rebuild-higher compression ratio?
pining=detonation which occurs with to advanced timing or lean fuel
mixtures-could be as simple as wrong grade of fuel. carbon deposits in the combustion chamber can also cause pre-ignition.spark plug gapping or even to long of a plug? there is also the posibility of a vacuum leak or intake leak as this would lean out the fuel mixture-scan tool read fuel trim and o2 readings bad sensor or exhaust leaks could cause fuel mixture issues as well. hope any of this helps..

Apr 15, 2010 | 1990 Chevrolet K1500

1 Answer

It is the vORTRC4.3 iT IS THE VORTECH 4.3 ENGINE. I have replaced timing chain & gears, Distributer, and fuel filter, fuel injector "SPIDER", i HAVE CHANGED OUT PLUGS & WIRES AND THIS THING STILL...


Sounds like a possible Idle Air Control valve, or more likely there is carbon stuck in the EGR valve. If the EGR valve is stuck open because of carbon chunks, the engine will run very rough, barely idle, and surge. Remove the EGR valve, clean the inside of it with carb cleaner, and replace the gasket with a screened gasket. This doesnt allow carbon the reach the valve and clog it again. Valve is located on front of the intake manifold. . .under the rubber intake boot going into the throttle body

Feb 23, 2010 | 1993 Chevrolet S-10 Blazer

1 Answer

3.2 liter yamaha engine manual IAC valve How do I replace the IAC valve on this engine? Steps? I just bought a new one and I need to get it replaced. FORD 1994 Taurus SHO 3.2 liter engine YAMAHA


may just need cleaning with carb cleaner.

here is 1996, oldest I have:

Section 03-14: Engine Controls, Electronic 1996 Taurus, Sable Workshop Manual
REMOVAL AND INSTALLATION Idle Air Control (IAC) Valve Removal
  1. Disconnect battery ground cable (14301). Refer to Section 14-01 .
  1. Disconnect the engine control sensor wiring (12A581) from the idle air control valve (IAC valve) (9F715) at the idle air control valve electrical connector.
  1. Remove the two idle air control valve retaining bolts.
  1. Remove the idle air control valve and idle air control valve gasket.
Installation
  1. NOTE: If scraping is necessary, be careful not to damage idle air control valve gasket surfaces, or drop material into intake manifold (9424) or throttle body (9E926) (depending upon application).

    Clean idle air control valve gasket mating surfaces.
  1. To install idle air control valve, reverse Removal procedure.
  1. Tighten the idle air control valve retaining bolts to 8-12 Nm (71-106 lb-in).
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Jan 14, 2010 | 1994 Ford Taurus

2 Answers

Replacing Idle Control Valve on 97 Pathfinder, need help!


it's on the throttle body. Here's a Quest with same 3.0L engine. These often need cleaning with carb or throttle body cleaner

Idle Air Control (IAC) Valve When the engine (6007) is running but not at idle, the throttle valve controls the amount of air admitted into the engine. The powertrain control module (PCM) (12A650) increases the fuel injection output in proportion to the increased airflow to achieve the appropriate air/fuel ratio. During idle, the throttle valve is almost fully closed. It is therefore necessary for the idle air control system to supply air for combustion during idle. The idle air control (IAC) valve allows a metered amount of air to enter the intake manifold (9424). The camshaft position (CMP) sensor detects engine speed and sends a signal to the PCM. The PCM sends a duty cycle (On/Off) signal to the IAC valve which allows additional air to enter the intake manifold. Air is added by the IAC valve to maintain the set lowest idle speed at which the engine can operate. The idle speed adjusting screw allows adjustment of the airflow into the intake manifold.

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Fast Idle Control (FIC) Solenoid The fast idle control (FIC) solenoid helps maintain a constant idle speed while the air conditioning is operating. When the air conditioning is turned on, the front climate control panel sends out two signals. One signal is sent to the powertrain control module (PCM) (12A650) to engage the A/C compressor (19703). The second signal is a ground signal sent to the FIC solenoid relay, to engage the FIC solenoid. The FIC solenoid supplies additional air to adjust the increased engine load.

May 27, 2009 | 1997 Nissan Pathfinder

1 Answer

87 Iroc (305 TPI) runs rough, lopes and lacks...


SOUNDS LIKE A VACUM LEAK,POSSIBLY INTAKE GASKET OR VACUM HOSES,GET SOME BERKIBLE 2+2 SPRAY DOWN INTAKES WHERE MEET HEAD AROND THROTTLE BODY AND ALSO EGR VALVE TO MAKE SURE IT ISN'T PARTAILY STUCK OPEN, VACUM LINES AIR INTAKE HOSE BETWEEN THROTTLE BODY AND AIR FLOW METER,ALSO MAKE SURE ITS NOT DRY ROTTED AND SUCKING AIR,THE ENGINE IDLE SHOULD GO UP OR DOWN DEPENDING HOW BIG THE LEAK

May 17, 2009 | 1987 Chevrolet Camaro

3 Answers

STARTS ROUGH IDLE AND WILL ONLY ILDE FOR ABOUT 30SEC


sounds like a fuel delivery problem. try cleaning carb.

Aug 07, 2008 | 1998 Mazda 626

2 Answers

Stops running


idle air control valve is slow or clean our air intake thank you Pierre

Jun 23, 2008 | 1998 Chevrolet K1500

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