Question about GMC C1500

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97 GMC 4.6 V6 1500 P/U. When the truck is under a moderate load(accelerating) It has a slight miss. I have changed the plugs. It has 96,000 miles.

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  • gladgmc Sep 07, 2008

    1995 GMC Sierra C1500 4.3L V6 w/79000 miles. When accelerating and when engine is under a load, vehicle has slight miss, especially when engine is at warm operating temperature. Plugs have been replaced, timing reset, and topend engine cleaner run through to eliminate carbon build-up. The problem still exists. Any suggestions of what to do next?

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Replace the distributor cap and rotor, sensor wheel is likely covered in carbon buildup.. common issue. I have to replace my cap and rotor every year for the same issue... textbook

Posted on Jan 08, 2011

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Intermittent miss at idle and steady speeds


You need to hook up a computer scanner to the engine to find out what the fault code is [indication of what is causing the miss]. The CHECK ENGINE lamp lights up when a fault code is detected and set in the computer's memory. ALWAYS replace all the spark plugs on a Ford when there is a miss. Those "alleged" 100,000 mile spark plugs are really only good for about 60,000 to 65,000 miles. Using them longer than 60,000 miles causes the ignition coils to overheat [from trying to fire the huge gaps on those worn out spark plugs] & fail. Hopefully, you will get a fault code to tell you which cylinder is the problem. When you disconnect the battery, you give the PCM [engine computer] a case of amnesia, and it forgets the fault codes it has stored in it's memory. That's a foolish move, as it only removes the info a "real" mechanic needs to solve the problem. Use only Motorcraft, NGK or Denso spark plugs. Other brands won't last in a Ford product.

Nov 09, 2014 | 2002 Mercury Mountaineer

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1993 Mitsubishi v6 Verada missing at idle.


Please about the diagnosis and repair of engine misfires here.

Oct 16, 2012 | Mitsubishi Cars & Trucks

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Engine is missing under acceleration, once hot, it misses just cruising on the highway. I have 173K miles, original plugs and wires and such. I have have had no problems until just the last 2 days. Came...


It's about time to change plugs!!!!!! They normally get changed at 100K. If you have the 6 cylinder engine, there are no wires, the coil pack just sit on top of the plugs.
Have you ever done any of the fluid changes on the differentials and the transfer case? Transfer case needs to be done every 50K and diffs every 100K.

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My 1996 GMC Suburban has 170600 miles on it. In the last week, it drives fine until you travel about 1/4 mile & reach 30 mph. Then, you loose acceleration. When you push the gas, the engine just revs....


Try dropping the tranny fluid and changing the tranny filter and filling with fresh fluid. Sounds like the tranny is sleeping between shifts.

Apr 09, 2011 | 1996 GMC Suburban

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I have a 1995 E350, 5.8, 130k miles. Always well maintained. Replaced Plugs, Cap & Rotor, Fuel Filter & Air Cleaner prior to a 3,500 mile trip. Now, 3 weeks have passed, van starts & seems to...


Maybe the timing is off, could ir be that you accidently moved the distributor while replacing the cap and rotor? If you have acces to a timing light give it a try. Good Luck.

Sep 28, 2010 | 2002 Ford E350

1 Answer

K2500 chevy 3/4 ton pick up. no power under load


IN your distributer under the rotor is a magnet and a pickup coil (the magnet is known as a pole piece) check your pickup coil for corrsion (green in color) and the module and also check pole piece for cracks in the magnet where the rivets hold it together. sometimes oil wicks up around the distributer shaft because of housing wear or the pieces just wear out over time.

May 16, 2010 | 1999 Chevrolet K2500

1 Answer

'97 Rav4 engine still misses at 2k rpms and under.


In our days that little misfire can be anything , bad head gasket , open evap system , vacuum leak etc., you name it.
It's not easy to diagnose cars anymore , so just leave it to your mechanic.

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1 Answer

I have a 1999 Ford Expedition and it started missing about a week ago and has progressively gotten worse, but it only misses when you accelerate or the engine gets in a bind (like going up hill) any...


How many miles? Have you ever serviced the spark plugs? I will assume it's a 5.4 V8, since it's more common than a 4.6.

In my experience with 5.4's, at about 120-140k miles, the coil-on-plugs tend to start dying. You will only feel the miss on acceleration and under heavy load, but may feel a slight wobble when the truck is at idle.
Not knowing how experienced you are with vehicles, I will give a slight overview. The traditional older vehicle has a single coil that delivers high-voltage to all of the spark plugs to cause the spark and ignite the fuel in the cylinders.
On these newer vehicles, each spark plug has it's own coil that is attached to the spark plug.
Unfortunately, there is no easy way to determine which coil is not firing without unplugging the wiring harness on each coil and seeing if the behavior of the engine changes.
However, in my experience, once one coil dies, the others aren't far behind. It may be worth your while to change them all at once.
The downside is, they are not cheap at about $43/ea at autozone. The upside, is they are extremely easy to change yourself. Simply unplug the electrical connector off of each coil at the spark plug. Then remove the 8mm bolt that holds down the coil. Pull off the sparkplug and replace.

I changed a full set in the parking lot of a hotel in South Fl last year, and it took me about 1 hour.

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1 Answer

100,000 miles check list


Ok, this actual model will hold up quite well under moderate driving conditions but, you will need ot do a few things here. check the list below for further information.


CHECK LIST(100,000mi)

1 Spark Plugs-replace asap
2. Automatic Trans Fluid Filter-replace asap
3. Automatic Trans Fluid-change asap
4. Ignition Cable(s)- Inspect for damage and, change if damage is visible.
5. Inspect the engine oil and filter.
6. Finally, get a basic lube job.

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1 Answer

The car that I'm about to buy, has a slight inconsistent **** under light acceleration and there is a slight wobble in the steering wheel at any speed.I also would like to know if it has a timing belt or...


The 1993 929s with a 3.0 liter had a timing belt.I recomend that it be replaced every 80 thousand miles if not sooner.So yes its ready for one.I would say to check the tires first for the vibration.Good Luck!!!

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