Question about 1988 GMC C1500

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Engine sputtering on a 1988 GMC C1500 pickup

I have a problem with the engine sputtering when I drive the vehicle; spark plugs, distributor cap,and rodery button along with fuel filter has been replaced; fuel additive has even been added to the gas tank. No matter what I do, it only seems to do better for a day or two and then it goes back to doing the same thing. I feel the sputtering underneath the gas pedal if that helps solves the problem.

Posted by Anonymous on

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  • 252 Answers

You didn't mention anything about new plug wires. Might be an area to look into

Posted on Aug 03, 2017

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  • GMC Master
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You did not say what the mileage is. Judging from the age, I would say it is pretty high. The issue most likely related to timing. The shaft that turns the distributors rotor cap has bushings on it and it also is driven by gears inside the engine. They wear out and the timing becomes off. Also you can get a lot of wear on the timing chain and gears at that age.

Posted on Aug 03, 2017

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Posted on Jan 02, 2017

redbeard00
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SOURCE: check engine light with low emission code for catalytic converter

Check the fuel pump pressure. should be between 60 to 66 psi. There isn't an easy answer for this one. You may need to perform component testing and a diagnostic check.

Posted on Jun 09, 2009

messstat
  • 365 Answers

SOURCE: 88 GMC C1500 idle problem

Unfortunately, the ECM isn't "OK"...Get a read on the computer and go from there...if I had to guess I'd say ALL the O2 sensors are fouled...especially if you use gas additives or starting fluid.
Good Luck
P.S. did she ever backfire on you?

Posted on Jun 14, 2009

csmock132
  • 4669 Answers

SOURCE: 1992 Siera k1500 4x4 Replaced rotor, distributor

Have you checked fuel pressure? 12 psi?

Posted on Jun 24, 2010

roniecon
  • 6826 Answers

SOURCE: 02 gmc sonoma 4.3 engine starts and runs great for

Smell of the oil,to see if the fuel injector(spider)is leaking into the crank case,if so,the intake will have to be removed to repair the problem,oh,and change the oil.

Posted on Jul 11, 2010

  • 6 Answers

SOURCE: I have a 1998 GMC 1500 4WD pickup where I was just

I'm leaning toward timing 180 out too, but the easy way is to switch around plug wires on to of the cap. It's a faster way to determine if it it's the problem. Switch # 1 with 6, 7 with 4, 3 with 2 and 5 with 8. That will change where the spark goes to. Another Solution is to carefully rotate the cap with wires still attached. Either method will rotate during order 180 degrees without pulling the distributor. If it runs more like it should, then I would pull the distributor and rotate it. But rotating cap or switching the wires on the cap to the correct order will determine if that is ths case. I would like to know if I helped youso please let me know

Posted on Dec 16, 2012

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1 Answer

Would the electronic distributor pickup cause a vehicle to spit,sputter and cut out at a high rate of speed ????


First you can not put Bosch plugs in it. Also watch cheap wires from parts house. Also check fuel pump pressure at high speed. Also watch for Catt converter plugging. Try unscrewing up stream o2 on both sides then drive. If goes away plugged Catt. You can scan those and see fuel values. Then you can tell. Any codes?

Mar 11, 2017 | Dodge Cars & Trucks

1 Answer

Need firing order on 96 Chevy Silverado and how to place the distributor


Distributor

ABCDEFGHIJKLMNOPQRSTUVWXYZ

Inspect/Replace

To Remove
  • Disconnect the distributor wiring connector and the vacuum advance hose, if the vehicle is so equipped.
  • Remove the distributor cap and note the position of the rotor. Mark the position on the distributor housing.
  • On some vehicles, it may be necessary to remove the spark plug wires from the cap prior to cap removal.
  • Note the position of the vacuum advance, then remove the distributor holddown bolt and clamp.
  • Pull the distributor from the engine. Most distributors will need to be twisted as they are pulled out of their bore.
  • Once the distributor is removed, install a shop towel in the distributor opening to keep foreign material out of the engine block.
  • The entire assembly should be cleaned thoroughly. Make sure all solvent residue is completely removed.
Installing and Timing a Distributor
The following procedure may be followed to install the distributor and time it to the engine, if all reference marks were made during the removal of the distributor:
  • Lubricate the O-ring on the distributor shaft.
  • Position the rotor so that it is aligned with the mark made on the distributor housing prior to removal.
  • Align the distributor housing with the mark made on the engine block during removal.
  • Lower the distributor into the engine block, making sure the distributor drive is fully seated.
  • Distributors equipped with a helical drive gear will rotate at the distributor is being installed, causing the distributor to move away from the reference marks.
  • Pay attention to how much the rotor moves.
  • Remove the distributor and move the rotor backward the same amount. This should allow the shaft to rotate while the distributor is being installed and still be aligned with the reference marks.
  • Make sure the distributor housing is fully seated against the engine block. Sometimes it may be necessary to wiggle or rock the distributor to seat it fully into the drive gear.
  • Distributors with drive lugs must be mated with the drive grooves in the camshaft. Both are offset to eliminate the possibility of installing a distributor 180 degrees out of time.
f22-52.gif The distributor must be aligned with the camshaft drive to seat the distributor in the engine block or cylinder head.
  • Rotate the distributor a small amount so the timer core teeth and pick-up teeth are aligned.
  • Install the distributor holddown clamp and bolt, leaving the bolt slightly loose.
  • Install the spark plug wires in the direction of distributor shaft rotation and in the cylinder firing order.
  • Connect the distributor wiring connectors. The vacuum advance hose is usually left disconnected until the timing is set with the engine running.
If the engine has been cranked while the distributor is removed, or no marks were made during removal, use this procedure to reinstall the distributor:
To be sure that the number one cylinder is on its compression stroke, observe the rocker arms to see that they are both moving. Then, rotate the crankshaft one revolution until the rocker arms for the companion to cylinder number one are both moving at TDC (top dead center). Align the timing mark and install the distributor with its rotor pointing to the number one spark plug cable in the distributor cap.
f22-01.jpg
  • Remove the spark plug from cylinder #1. Install a test plug in the end of the spark plug wire and position the test plug away from you and cylinder #1.
f22-02.jpg
  • Place your thumb over the bore for the spark plug and crank the engine until compression is felt.
f22-03.jpg
  • Lightly crank the engine while observing the timing marks on the crankshaft pulley. Once the timing marks are aligned, stop cranking.
f22-04.jpg
  • Identify the position for the #1 spark plug wire on the distributor cap.
f22-05.jpg
  • Determine which way the distributor shaft will rotate when it is lowered onto the camshaft gear. Then position the rotor so that it will be under the #1 terminal on the distributor cap after the distributor gear is meshed with the camshaft gear.
f22-06.jpg
  • After the distributor is installed in the engine, turn the distributor housing slightly so the pickup coil is aligned with the reluctor.
f22-07.jpg
  • Install the distributor holddown clamp and bolt. Hand tighten the bolt.
f22-08.jpg
  • Connect the pickup leads to the wiring harness.
f22-09.jpg
  • Install the spark plug wires onto the distributor cap according to the engine's firing order. Check to make sure everything that was disconnected before the distributor was removed, is now connected. Connect a timing light and prepare the engine for an ignition timing check and adjustment.

Feb 17, 2013 | Cars & Trucks

1 Answer

Ok I have replaced the Distributor, Cap, Rotor, checked all spark plugs and my 93 chevy c1500 is still jumping RPM'S when driving and will shut off! Can someone please help me??/


It could be a fuel problem, the pickup coil in the bottom of the distributor, or the ignition module among other things.
Someone would need to figure out if the ignition system is causing the problem or if one of the injectors is failing.

Sep 30, 2012 | 1991 Chevrolet C1500

1 Answer

Changing pickup coil


You have to remove the distributor from the engine then remove the distributor shaft from the distibutor housing, then you can remove & replace the pickup coil. Make sure you marke the exact location of the distributor body in relation to the intake manifold and note exactly where the rotor is pointing in relation to the distributor cap. I always set the timing marks on the front pulley at zero and make sure that the rotor is pointing at the #1 plug wire terminal on the cap before removing any distributor as it makes getting it in time easier if you lose your marks. You should reset the ignition timing when you have it all back together again as you'll most likely be off a few degrees. Some of these distributors had problems with the magnets in the distibutor shaft that would mimic a failing pickup coil and they were prone to drive gear wear. If you suspect any of those problems it's often easier to replace the entire distibutor with a reman unit.

Jun 08, 2010 | 1998 Chevrolet C1500

1 Answer

When im driving my truck,it starts to sputter and


I would try spark plugs and wires. If it was a fuel line you would see the leak or atleast smell it very strongly. If the problem still exists after new plugs and wires try the distributor cap.

Apr 21, 2010 | 1988 Mazda B2200

1 Answer

Firing order for a 1986 gmc s15


FIRING ORDERS

To avoid confusion, ALWAYS replace spark plug wires one at a time.

The most important thing to remember about the removal and installation of a distributor, cap or spark plug cable is that all wires MUST be labelled before they are disconnected. Keep in mind that these figures depict a firing order where the distributor cap terminals are relative to EACH OTHER only and they do not necessarily depict the tower positions in relation to the rest of the engine. This is true because any distributor which has been removed and reinstalled may have been installed with the No. 1 spark plug tower at any position (360 degrees) in relation to the rest of the motor, as long as the rotor aligned to the No. 1 tower when the No. 1 cylinder was at TDC of the compression stroke (valves closed, ready for the plug to fire). As long as the remaining wires were connected in the correct firing order sequence (depending on direction of distributor rotation) the engine will run. DO NOT EVER remove more than one wire from the distributor cap at a time unless you tag ALL wires and towers to assure proper installation.

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Fig. 1: 1.9L engine . Firing order: 1-3-4-2 . Distributor rotation: counterclockwise

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Fig. 2: 2.0L engine . Firing order: 1-3-4-2 . Distributor rotation: clockwise

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Fig. 3: 2.5L engine . Firing order: 1-3-4-2 . Distributor rotation: clockwise

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Fig. 4: 2.8L engine . Firing order: 1-2-3-4-5-6 . Distributor rotation: clockwise

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Fig. 5: 4.3L engine. Firing order: 1-6-5-4-3-2 . Distributor rotation: clockwise

I hope help you with this (remember rated this help) Good luck.

Oct 05, 2009 | 1986 GMC C1500

1 Answer

My 92 isuzu pickup engine misses


Hello, You may need to replace your spark plugs, plug wires, and if you have a v6 engine with a distributor you will need a distributor cap and a rotor button.Please rate this answer thank you.

Mar 09, 2009 | 1999 GMC Suburban

1 Answer

1988 GMC 1500 2wheel drive with 4.3 litre.


Check the ignition timing and firing order you may have some crossfire in the distributor cap as well

Sep 01, 2008 | 1988 GMC C1500

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