Question about 1990 GMC C1500

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1990 GMC C1500 5.7 Litre engine will not start. Has a hot spark and gets gas. New rotor button & distributor cap. Wires are right & at tdc rotor points to #1 plug wire.

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Crank position sensor. When this goes out the engine will fire for 1 or 2 seconds and then shut down.

Posted on Sep 28, 2010

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Posted on Jan 02, 2017

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95 1500V 6 get gas a spark but don't. Strart new cap wire. Coil I don't what to do now some body help me


Is this a GM vehicle? Which one, what is engine litre size?
How long since a tune-up? If no spark check plugs and plug wires--check cap and rotor. If it has a coil wire to distributor take it loose from distributor, hold close to engine ground, have helper crank while you watch for spark, if no spark, could coil wire or coil, Check primary voltage coil, usually goes hot with key on. The coil also needs a ground usually controlled by ignition module.

Mar 11, 2016 | Cars & Trucks

1 Answer

How to fix distribitor timing problems


Remove number, one spark plug , turn engine over till compression is felt, turn engine over till TDC marks on crank pulley and timing cover marks line up, fit distributor to motor with rotor pointing to number one distributor cap tower, start and set final timing with timing light.

Sep 21, 2015 | 1999 GMC Jimmy

1 Answer

1990 geo storm sohc is running rough. Parts that are new: cap, rotor, plugs wires,plugs, pickup coil, and the ignition module looks brand new. The coil is old, but is still sending spark through all t


the timing is 180 degrees out so ignore where no 1 lead should be and rewire the HT leads to the new position for no1 cylinder. The crank timing mark should be on 10 degrees advanced. Engines are timed off the crank position so forget the cam position.
Or you can start again. Remove no 1 plug and turn the engine over until you feel compression under your finger over the plug hole. Set the timing on the crank to 10 degrees before tdc. Position the distributor so that the point of the star is directly opposite the exciter coil in the distributor. The rotor button should now be facing no 1 cylinder plug lead adjust the HT leads so that they will fire in the 1342 firing order. Start the engine and with a timing light attached to no 1 plug lead adjust the timing mark to specifications by turning the body of the distributor.

Nov 06, 2014 | 1990 Geo Storm

2 Answers

Timing is off on my 1990 ford f150 v8 302


There are a few ways and if I remember correctly, if you have a Module on the distributor you also have a wire sprout which must be disconnected to get base timing.

That being said, those modules still had a timing mark on the crankshaft damper and a timing mark pointer. You want to have the crankshaft visibly marked and the pointer at the DEGREES recommended for the motor. You will see TDC on most dampers and then advance it maybe 6 degrees as marked.

Assuming you are close to begin with, AFTER lining up the parts as recommended, mark the distributor #1 plug position on the cap to distributor housing so that the #1 plug terminal is known when the cap is temporarily removed, wires intact.

Then see where the rotor is pointed and remove the distributor and clock the rotor to align with the mark you put on the distributor housing. If you have a gear drive, the gear will need to be moved slightly for the rotor to twist into place when the distributor is seated. With a timing light, check where the spark is occurring for #1.

You may be close enough for the engine to start.

Other ways involve removing a plug(#1) and turning the engine until compression pushes your finger away from the cylinder hole. Line the timing marks up per specs, do the same process for the distributor rotor and try it again.

If this still does not produce the results you want, make sure the plug wires were not switched. Finally removing the valve cover to observe when intake and exhaust are both closed will help, but it is a lot off unnecessary work to be avoided.

Nov 18, 2013 | 1990 Ford F150

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

1 Answer

I have a 1990 mitsubishi might max it wont run smooth unless you keep your foot on the gas and keep the rpms up a little bit and it wont drive cause it stalls everytime you try to move it. ive replaced the...


You've already eliminated the spark plug & wireset, distributor cap & rotor.
Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.

Components checked/replaced during a tune-up are:
air filter
motor oil
motor oil filter
breather filter
fuel filter(s)
fuel strainer
PCV valve
EGR valve
spark plugs
spark plug wires
ECM or distributor cap & rotor
cabin air filter
transmission oil filter
transmission oil
engine coolant
check all vacuum hoses and lines

Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:

Priority Action Part Type -- Cause
1 Inspect Battery -- Battery Discharged or Faulty.
2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned.
3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter.
5 Inspect Ignition Coil -- Faulty Ignition Coil.
6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter -- Starter Motor Faulty.
9 Inspect Fuel Pump -- Low Fuel Pressure.
10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch.
11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive -- Faulty Starter Drive.
15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank -- Fuel Tank Empty.
19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke.
20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.

Aug 17, 2011 | 1993 Mitsubishi Mighty Max

1 Answer

I have replaced distributor cap, rotor button,plugs and wires


I had the same problem. Google your engine I had a 4.3. Click images for fiiring order you will find it. You can also click video for setting timing. I got mine running with this information. Just remember that there are two marks on the harmonic wheel one for TDC & BDC. Also you need 3 things air/fuel/spark. Make sure you have these before replacing parts it gets spendy. I got my whole distributer and spark module for 40.00.

Jul 14, 2010 | 1991 GMC Sonoma

2 Answers

How do i remove a distributor in a 1996 gmc sonoma


Question 4.3 Litre V6 or 2.2 Litre inline 4 cyl.

Procedure as follows: in either case remove # 1 cyl spark plug and rotate engine until # 1 piston is at top dead center , with a suitable marking pen make a reference mark on crankshaft harmonic balancer and timing mark indicator on engine timing cover. Make a notation on the distributor cap of the number one spark plug wire and also note the remaining wires firing order sequence on cap in order of rotation. Remove cap and note and mark rotor location , make a reference point on distributor body as well as engine block . Remove cap and wires , loosen distributor lock down bolt , disconnect distributor wire harness and label harness for reference to reconnect upon re-installation. Twist as you pull up on distributor , distributor should come out freely with minimal effort but occasionally they can be a little tough and need to be helped out with minimal extra persuasion...

If you find that upon re-install you get a trouble code P1345 don't threat just start over the process of placing # 1 cyl at TDC and then reference the marks you made during dismantle, There is a + - 3 degrees tolerance that the computer can adapt... But you will have to erase any trouble codes... You should not have to remove the hood, maybe just the air box and or filter housing for easier access.... Unless you are removing entire engine then yes remove hood by all means, mark hood hinges and mounting holes before removing for easier alignment during install of hood... Hope this helps...

Aug 23, 2009 | 1996 GMC Sonoma

2 Answers

1990 nissan sentra wont start


It seems you have a timing problem. Have the engine timed properly. If that does not work it could be a craked rotor or distributor cap. have all these checked.

Jul 30, 2008 | 1990 Nissan Sentra

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