Question about 1994 GMC Safari

1 Answer

I have a 1994 GMC Safari 4.3 Vortec, W code. It is missing at low speeds but will accelerate fast to 70 and run smooth. When I pulled the plug wires to locate the miss I found 2,4, and 6 would each cause the engine to vibrate badly. When I pulled 1,3, and 5 I could not see any change in the motor, although I do have fire on each plug. I have new plugs and plug wires. My fuel pressure runs 58-60 pounds with a little drop when I first accelerate.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,926 Answers

To test the ignition coil, the distributor cap must be removed from the distributor.

  1. Remove the electrical connector from the distributor cap and the distributor cap from the distributor. Place the distributor cap on a workbench in the inverted position.
  2. Using an ohmmeter (on the low scale), connect the probes between the primary (low voltage) terminals; the reading should be low or nearly zero, if not, replace the coil.
  3. Using an ohmmeter (on the high scale), connect the probes between a primary (low voltage) terminal and the secondary (center terminal or high voltage) terminal; the reading should be high (not infinite), if not, replace the coil.

For this procedure, the ignition coil may be removed from the engine or simply remove the electrical connectors and test it on the engine.
  1. Using an ohmmeter (on the high scale), connect the probes between the primary (low voltage) terminal and coil ground; the reading should be very high or infinity, if not, replace the coil.
  2. Using an ohmmeter (on the low scale), connect the probes between both primary (low voltage) terminals; the reading should be very low or zero, if not, replace the coil.
  3. Using an ohmmeter (on the high scale), connect the probes between a primary (low voltage) terminal and the secondary (high voltage) terminal; the reading should be high (not infinite), if not, replace the coil.

I have a 1994 GMC - 0bdf71c.jpg

Posted on Aug 21, 2010

1 Suggested Answer

  • 2 Answers

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

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.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Spark plug gap 96 gov safari ACDelco platinum 41-942

Spark Plug Gap - AutoZone

AutoZone2004 Mercury Grand Marquis 4.6L SFI 8cyl ' Specifications ' Spark Plug Gap. • Spark plug gap size?
Jul 27, 2015 - You're doing a '96? I think EARLIER 2nd Gen 4.3's used a .045" gap ; I believe it changed in 2000 or 2001 but don't quote me on that. All i'm ...Missing: gov • View topic - spark plug gap question > ... > ENGINES GENERAL/PERFORMANCE

Nov 28, 2012 - 15 posts - ‎4 authors
My question is do I gap the spark plugs per 89 4.3 specs or do I use the 95 .... The vortec heads for a V8 chevy are 1996 and up however there ...Missing: gov

What is the proper sparkplug gap? - CarGurus > Questions > GMC > Jimmy

CarGurusMar 16, 2013 - My Haynes manual and various places I've seen online say the gap is .045 inches ... spark plug gap for 1992 4.3 160 HP? ... Used GMC Safari".Missing: gov

[PDF]2000 GMC Safari Owners Manual - GM Extended Warranty

Jan 27, 2016 | Cars & Trucks

1 Answer

When pressing on the accelerator my safari bogs down and starts to lose power.

Sounds like the accelerator linkage or kick down band of the transmission need adjustment.

Mar 23, 2015 | 1998 GMC Safari

1 Answer

I've got a 1994 GMC Jimmy 4.3 vortec v6. The truck

You may also want to check inline fuel filters they may need replacing

May 06, 2013 | Cars & Trucks

1 Answer

Had the spark plugs and plug wires changed on my 1994 GMC Safari minivan, and now it runs very rough. If I stop, the engine shuts off. Backfires a lot also. The whole van shakes bad going down the road....

If your Safari did not expecience these systoms prior to you changing the plugs and ignition wires, then you may have crossed two or more of these wires when they were repalced.

Feb 20, 2011 | 1994 GMC Safari

1 Answer

1988 Toyota Camry 2.5 liter V-6. Engine starts fine, but after started it misses. The car misses terribly under a load, but will sometimes accelerate smoothly if you accelerate at a very slow pace. Will...

most misses are injector related either from dirty injectors , low fuel pressure ow injector wiring faults
use a quality injector cleaner for a tank or two
run the fault codes to check for other related sensor problems

May 23, 2017 | 1988 Toyota Camry

1 Answer

Engine missing --started missing all of a sudden . replaced plugs and cam sensor in dist.. Roter and dist. cap and wires in good shape. Had a test on the engine, said that it was miss fireing at several...

On my 2002 safari I had a inter miss fire. After double checking all electrical. I had a bad injector of all things that was bad. My not be ur case but I thought I would mention it

Feb 08, 2010 | 2000 GMC Safari

2 Answers

Ihave problem with 92 gmc safari it drives sometimes during driving car buck like it.s out of gas . I'll turn igntion on and off real quick. and car drives ok. Ihave replaced fuel pump.

sounds like a bad plug wire, take a squirt bottle while the car is running then spray the wires down they should start arcing, also when you replaced the fuel pump did you replace the fuel filter

Apr 29, 2009 | 1992 GMC Safari

1 Answer

My 1994 Safari engine struggles at times. I think it may be one of the vacuum lines or the PCV valve. Not sure though?

chances are your fuel pump is dying. vortec engines run poorly on low fuel pressure. min fuel pressure is 52psi. max is 55 psi

as you can see there is not alot of wiggle room

Apr 11, 2009 | 1994 GMC Safari

Not finding what you are looking for?
1994 GMC Safari Logo

Related Topics:

212 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

75066 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

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

Answer questions

Manuals & User Guides