Question about 1987 Chevrolet R10

1 Answer

Engine running rough at all speeds. With air cleaner of i can hear it backfireing when i raise the engine speed. Has good compression avreage 152 psi. Cap and rotor should be replace and the plugs are all black and i plan to replace them as well but my concern is will this fix my 87 chevy r10 with the 4.3 v6?

Posted by Anonymous on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 31 Answers

Timing, timing, timing. Usually, backfires, pings, funky acceleration and "dieseling" are all traced to ignition timing. In truth, a 4.3 is just a 5.7 with the back two holes cut off, so there's not a whole lot to mess with (unless it's MPFI, not TBI.... if it's the "Spider" injection system, God be with you.) Seriously though, perform a major tuneup, including plugs, wires, cap and rotor, fuel filter, and just for good measure, air filter. If the wires are cross-firing, or even just arching, that's a huge problem. Also, look at the plugs when you get them out - those are the best way to see how your engine is running. Just a yellowish/brownish discoloration generally means you're good. White means you're running lean. Black and that cylinder has been running rich. If you find a plug with a lot of carbon and/or black coloration, check that cylinder's ignition wire. Probably been arching out.

Lastly, don't be cheap. Get the best wires you can afford. Going with economy, "green box" wires would be like doing nothing at all. When I was a wrench, customers would come in after giving their vehicles a tune up, and the new, cheap wires were as bad as the old ones. At night, under the hood, they literally arched so bad they looked like a strand of Christmas lights. And, MAKE SURE TO KNOW THE FIRING ORDER!!!!! Easiest way to do a wire change? One at a time. After that's all done, and if the problem persists, check the timing. In fact, check it, or have it checked, anyway.

Good luck!

Posted on May 22, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

IDLLING SLOW


Engine stalling and rough run issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Aug 31, 2012 | Cars & Trucks

1 Answer

I have a 2000 ford explorer sport 4.0L OHV, in the mornings when first started it runs real rough until it goes through its cycle of runing rough then it cleats up and runs ok. Then when u park it after...


Here are the most common causes of idle surge, rough idle esp when cold, other symptoms include 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, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

Jul 09, 2017 | Cars & Trucks

1 Answer

Running rough-1987 Ford Ranger 2.3 L 4 cyl. Had been running very smoothly until 2 weeks ago when it began backfiring and running rough, especially at low speeds, without my having made any adjustmen


If your car has a mas air flow sensor (usualy located right aroung air filter or in air passage after the air filter) check and clean the sensor. This looks like a small spring on the end of 2 wires. BE CAREFUL not to damage the sensor. I have seen where the sensor gets dirty over time and this can cause a rough idle.

Jul 11, 2012 | Cars & Trucks

1 Answer

Stalls in drive, runs grear in reverse


Engine stalling and rough run issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Jul 06, 2012 | Cars & Trucks

1 Answer

92 NISSAN WITH BOGGING AT 2800 3500 RPM AND AT LEVEL SPEED 4CYL AND 5 SPEED


For this types of problem,there are few help inks to troubleshoot the problem.Click the link below to go through the troubleshooting procedure to resolve the issues :----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html-----------van idles rough? http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html
--------------runs lean and idles rough? http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html
-----------Car still runs Rough after tune up? http://howtobyme.blogspot.com/2011/12/car-still-runs-rough-after-tune-up.html
------------Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed? http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html
----------High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
------------Engine Backfires? http://technoanswers.blogspot.in/2012/02/jeep-backfires.html----------- Nissan stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

-----------
Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
---------How to adjust rpm? http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.

Feb 17, 2012 | 1992 Nissan Pickup

1 Answer

I have a 1991 Buick Park Avenue. Runs rough in


Here are 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 I want you to get a can of intake cleaner (ABOUT $5.00) from any local auto parts store like NAPA or Carquest, do not use carburetor spray, intake cleaner only or u will damage the Teflon coating inside the throttle valve and air bypass valve, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

May 25, 2010 | 1991 Buick Park Avenue

1 Answer

I have a camry model 97, I hear sound like air like whule accelarating the engine


If the idle speed is higher than normal,say 1200 rpm instead of 900,there is a vacuum leak.Spray throttle body cleaner around the hoses and vacuum lines.The leak will induct the cleaner,which will then burn because it is fuel and raise the engine speed.

Apr 14, 2010 | 1997 Toyota Camry

1 Answer

Engine bk firering & lose of compression.


Backfiring after warming up can be from many things.

One that comes to mind is carbon deposits on valves, causing them to not close properly. The carbon deposits would also heat up and then ignite air/fuel mixtures before the spark plug can fire.
Or you would have hot exhaust gasses leaking back into the cylinder on intake and that would ignite the fuel.

Tac gauge fluctuating, and engine running rough on acceleration could be a vacuum leak, do you hear a hissing sound when the engine is running? listen closely under the hood. If you have a vacuum leak you would lose power and your RPM would fluctuate oddly. As for the backfire however, there are probably more than just one problem. Its hard to say for sure.

So please, more details, noises you hear, when exactly everything happens etc.
What speed and RPM the engine begins to bog down at, does it stall? What range is ur tac fluctuating at? anything you can think of, throw it on there.

Hope this helps you

Apr 24, 2009 | 1998 Nissan Pathfinder

1 Answer

Rough idle, backfire on acceleration


check everything you can under the hood your air intake system all of it especially make sure all clamps are tight .. and make sure all vacuum hoses are good and not cracking or broken or just loose . you might run a little fuel cleaner through a tank of gas too cleaning the engine fuel system up some. just a few ideas.. Jerry

Apr 12, 2009 | 2002 Dodge Neon

1 Answer

Rpms Too Low


the idle speed is controlled through the on board fuel injection control module (known as the PCM), even if u raise the idle at the throttle body the computer will slow it back down, however there is a problem that causes slow idle, do the following procedure to correct the slow idle issue, follow it exactly.

Here are some of the causes of surges, 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, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Apr 07, 2009 | Pontiac Grand Prix Cars & Trucks

Not finding what you are looking for?
Cars & Trucks Logo

149 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...