Question about 1994 Chevrolet S-10 Blazer

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NO START HAS 60 PSI FUEL PRESSURE NEW IGNITION MODULE COIL PLUGS, WIRES CAP AND ROTOR .INTERMITENT SPARK AT PLUGS 4.3 VORTEC HEI IGNITION

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  • jhamil84 Feb 27, 2009

    has posative to all four wires with key on wiggled no problem found

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Check the wiring to the coil, it may have an intermittent short

Posted on Feb 27, 2009

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Why my 94 Astro van will not fire


this generation of gm vehicles is easy to troubleshoot. the engine needs 3 things to run: compression, fuel, and spark. since you mention fire, i assume you have no spark.

disconnect any random spark plug wire and connect the end to a hei spark tester. crank engine and observe for spark. if you have no spark, disconnect the center terminal of the distributor cap and use the hei tester in the same manner. spark means cap and rotor bad or bad plug wireset. no spark means make more checks.

check for battery voltage and good ground on distributor. check for open or shorted ignition module or ignition coil windings. if power and ground is present and ignition coil tests ok, check for ignition pulses at coil primary. if you have no ignition pulses feeding the coil, change the distributor.

with that generation of vehicle, the ignition system will operate without help from the computer. don't even troubleshoot the guts of the distributor, if you change the cap, rotor, and anything else, it will be the same price as a remanufactured distributor, and might not fix the problem. if you troubleshoot a low volrage related issue (no pulses, shorted or open circuit, unstable timing, etc), change the whole thing.

Jul 29, 2016 | 1994 Chevrolet Astro

1 Answer

I have a 97 chevy 350 vortec that i am having problems with, it has fire to all the spark plugs and it has fuel delivery. the truck all of a sudden turned off while driving and would not turn on again. i...


how did you make your test.spark plug wire test is made with special tools call HEI spark tester.and injector fuel pressure test.and wire to injector anoid light

Sep 19, 2013 | Chevrolet Silverado 1500 Cars & Trucks

2 Answers

94 chevy 1500 4.3 no spark no fuel


Sounds like you replaced alot of parts for nothing.
The pickup coil in the distributor "fires" the module which grounds the coil and the injectors.
Those components would need to be tested. The coil fires the plugs when the ground is removed by the module or the key switch.

Jan 08, 2013 | GMC C1500 Cars & Trucks

1 Answer

My 1990 hond accord will turn over but wont start can you please help


MAKE SURE SPARK PLUGS AND WIRES IN GOOD CONDITION, REPLACE DISTRIBUTOR CAP AND ROTOR,CHECK FOR SPARK AT SPARK PLUGS,IF YOU DONT SEE SPARK CHECK TO SEE IF POWER GOING TO COIL IF NOT CHECK IGNITION FUSE.IF FUSE OKAY AND POWER GOING TO IGNITION COIL,COIL FAULTY OR IGNITER UNIT FAULTY. CHECK FOR FUEL PRESSURE MAKE SURE FUEL FILTER BEEN CHANGED.FUEL PRESSURE SHOULD BE 40 PSI. IF YOU GETTING SPARK AND FUEL. YOUR IGNITION TIMING OFF OR VALVE TIMING OFF DUE TO A WORN TIMING BELT.

Nov 01, 2011 | 1990 Honda Accord

3 Answers

I have a 1993 chev pick-up v6 4.3, i just installed new spark plugs,new plug wires, distributor cap and rotor button.All plug wires are back in the right position,and i used the firing order 1-6-5-4-3-2...


This diagram is for 1998-1995 Chevy 6 cylinder 4.3L engines.
Your got the firing order exactly correct, at 1-6-5-4-3-2, but here's the thing to double-check:
The distributor rotation is clockwise (note badly rendered arrow in picture).



archaeology_96.jpg

Since you probably got everything right, then you're left with really unusual/rare causes of
failure of the ignition system:
(a) rotor button misaligned/failing to make contact?
(b) rotor button not pressed onto distributor shaft far enough therefore failing to provide correct
proximity to distributor cap contacts when coil fires
(c) coil wire or contact loose/disconnected - press coil wire firmly down into distributor cap.
(d) distributor shaft of other damage caused during installation of rotor.
(e) spark plug wires defective from factory
(f) spark plugs defective from factory
(g) battery low - may need a charge to start
(h) ICM (ignition control module) failure - hook up your HEI (high energy ignition) tester, and
watch the quality of the spark on each cylinder.
(i) fuel problem? If spark is being properly delivered, its gotta be a fuel problem...
(j) distributor cap not screwed down flush to top of distributor? maybe just on one side?

Inspect the inside of the distributor cap - if there are lots of little metal bits all over the inside
of the distributor cap, then you know you have a misalignment of some type in there, and the
rotor and cap are destroying each other. normal operation will throw a quota of spark-ed off
metal bits inside the distributor cap, but since your cap is brand new, your attempts to start
the engine should have rotated the distributor so few times, you should see no metal debris.

Inspect the distributor cap contacts to see if any spark marks are more of less in the middle
of the cap's proper "contact zone". If not, you've diagnosed an internal misalignment, which
you know how to correct.

Sep 14, 2011 | Chevrolet 1500 Cars & Trucks

2 Answers

Will turn over but not start have replaced plugs wires dist.cap rotor ignition module


Do you have spark??? if so, check fuel pressure, these trucks must have 60 psi to run, 50 psi will not work,.

Feb 06, 2010 | 1999 GMC Sierra

1 Answer

I have a 94 gmc safari wont start have 60 psi fuel good spark new plugs wires cap, rotor this p.o.s is getting to be a pain


Check the Ignition module, it's located under the rotor in the distributor cap. It's common for condensation to form there causing corrosion. Start with checking the wires for corrosion and then check the Ignition Module. Auto Zone sells them for around $45.00 and will have the step by step instructions to replacing it. Good luck and here is a link for you.

http://www.troublecodes.net/GM/

Dec 04, 2009 | 1994 GMC Safari

1 Answer

88 f 15- wont start have change coil, rotor, cap, plugs, fuel pumps, computer been working to get truck going 4 days no luck.


You need to see if you have fuel pressure at the fuel rail. Do you have any spark at coil and if you do is there spark at plug wire? If no spark at either check the ignition module and pickup coil.

Dec 11, 2008 | 1988 Ford F 150

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