1994 GMC Sierra - Page 9 - Answered Questions & Fixed issues
1994 gmc sierra. starts
check your mafs buy a can of mass air flow sensor cleaner.and spray it on the air by pass
9/8/2011 6:30:05 PM •
1994 GMC Sierra
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Answered
on Sep 08, 2011
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505 views
Can you put 16" tires
Yes you can. Many of the later 90's trucks came factory with 16" wheels and share the same bolt pattern. Be careful you don't purchase 6 lug wheels which the 4wd trucks use.
9/8/2011 2:48:43 AM •
1994 GMC Sierra
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Answered
on Sep 08, 2011
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191 views
94 GMC SIERRA, GREAT RUNNING
yes the IGNITION MODULE is the first place i would startshould be located just under the distributor cap lick the picture
9/7/2011 7:14:39 AM •
1994 GMC Sierra
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Answered
on Sep 07, 2011
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251 views
Im trying to start my
Well it could be a number of things. If you turn the key on and the dash lights come on like normal but when you try to engage start and the lights dim or you hear only a click... It could be a faulty starter selinoid. If you have no power at all when you turn the key to on it could be a fuseable link to the ignition or starter. I will need more info.
9/6/2011 10:19:55 PM •
1994 GMC Sierra
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Answered
on Sep 06, 2011
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139 views
I have a 2003 gmc
your TCM ( transmission control modual ) might have fried out what you can do is call a wrecker and see if they have a TCM there for your truck
In your truck the TCM is located beside one of the fenders with a big cable connected to it
all you have to do is fallow the wires leading from transmission to the TCM box
good luck!
9/3/2011 9:17:12 PM •
1994 GMC Sierra
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Answered
on Sep 03, 2011
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158 views
1994 GMC K1500. Ran great,
As per the problem which you mentioned in your question it says "
Once it gets up to op temp, idles very rough, won't take fuel, eventually dies. Won't restart til cold."-------
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Its low fuel pressure or problem with o2 sensor.----------
As per your problem mentioned, it indicates the problem with fuel
pressure.-------- The fuel pressure is low.---------- First thing you can do is
get the fuel pressure checked, this will confirm the problem. --------- If the
pressure checked low that means problem is with faulty pump and clogged fuel
filter.----------- If the fuel pressure is checked ok, then other possibility
is faulty o2 sensor and crank sensor. The o2 sensors are
before and after catalytic converter.-------Both the sensors are to be
replaced.------ And as per you mentioned your problem, its quite possible that
faulty o2 sensor will cause this problem.------ O2 sensor is the part which
sends signal to ECM( the cars computer).It sends signal to computer about fuel /
air mixture.How and when to send fuel to engine.--------- If o2 sends stops
sending signal to cars computer then it will not send the fuel to
engine.------- In your case the o2 sensor is getting overheated and this is
stopping the o2 sensor from sending signal to ECM.But when your car shuts off
the sensor gets cool and again it starts working.------ So as per problem, get
both the o2 sensors checked and replaced.---------- Also get the crank sensor
checked.--------This will help.Thanks.Helpmech.
11/13/2011 10:18:13 AM •
1994 GMC Sierra
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Answered
on Nov 13, 2011
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92 views
I have a 2000 gmc
Try using heat sink grease between the metal base of the ignition module and the mounting position, from the sounds of it the circuitry is overheating and failing. I noticed that this particular module is very hot while the truck is running with my own Sierra
8/30/2011 8:26:15 AM •
1994 GMC Sierra
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Answered
on Aug 30, 2011
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150 views
Will not start but if
you should be able to hear the pump run inside the fuel tank. on the firewall there is a relay under the black cover on the passengers side, thats the fuel pump relay. the ORANGE wire should have 12V, The wire going to the pump is GRAY and should have power when cranking. . theres also a 20 amp fuse there, make sure its good. If the gray wire has power, most likely the pump is bad. At the pump there is a BLACK wire that attaches to the frame near the left rear wheel, thats the ground for the pump make sure its good and tight.
8/25/2011 9:19:53 PM •
1994 GMC Sierra
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Answered
on Aug 25, 2011
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481 views
I have a 94 gmc
this looks like earth bleed.
this happens if one of the lights can not find earth so it bleeds through the next light to its earth thus lighting the wrong lights.
ensure the earthing to the lights is good.
Q. have any of the light cluster front or rear been replaced at any time since the problem started? it could be that the chassis earthing was not replaced on replacement of the light fittings.
find the chassis earth lead or connection point, ensure a good clean fit and maybe use some WD40 to ensure a good connection of the nut or clip. the earthing maybe part of the securing screws or bolts that hold the light in place.
I hope this was useful.
8/23/2011 10:45:24 AM •
1994 GMC Sierra
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Answered
on Aug 23, 2011
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344 views
1994 GMC 1500 Sierra 4.3
The distributor gear. It wears down and causes rough idling to no start. Pull the distributor, look where the rotor button is pointing as it needs to go in the exact same position. you can get just the gear and replace it. it is held in by a drive pin. Push it out and swap gears and reuse the drive pin. hammer it in.
8/17/2011 10:44:38 PM •
1994 GMC Sierra
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Answered
on Aug 17, 2011
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334 views
Battery light turned on. Could
Even though the battery is only one year old it might be the battery but I would look at and test the alternator as well.
8/10/2011 1:21:26 AM •
1994 GMC Sierra
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Answered
on Aug 10, 2011
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73 views
Replaced distributor cap wires and
check air flow threw the engine. Catalytic converter could be clogged up. And when was the last time you replaced the fuel filter? Replace this first
8/6/2011 10:31:01 PM •
1994 GMC Sierra
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Answered
on Aug 06, 2011
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81 views
I have a 94' gmc
If all you did was replace the distributor cap and now it won't start. Either the cap is the wrong one, or it is faulty, take it back to where you bought it and have it replaced for another one. Make sure it is the correct one for your model.
When you took the cap off, did you remove the rotor button also? If so did you remember to put it back, don't laugh it is a common mistake.
Something else to check is that all the plug wires are snug in the distributor cap. Test this by pushing down on the actual wires and not the caps. Some times they don't go in far enough.
A couple of other things to check in the cap is for 'tracking/arcing' you will see this by taking the cap off and looking inside it and if it is tracking you will see a what looks like a hairline crack, this is from the electrical charge arcing out.
Check the little carbon rod that sits in the top of the distributor cap make sure it springs in and out and isn't broken.
8/1/2011 2:01:00 PM •
1994 GMC Sierra
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Answered
on Aug 01, 2011
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219 views
When going into 1st gear
Hi Sep,have a look at the propeller shaft center bearing and check for wear. Also inspect the universal joints, being the most likely cause of your problem!Regards Johngee10
7/23/2011 12:02:20 PM •
1994 GMC Sierra
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Answered
on Jul 23, 2011
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242 views
I have the new altornator
if the pulley on the new alternator is different to the one that was on the original one you will have to change it,you may have to take it back to where you bought it & have it changed......hope this helps......cheers.
7/22/2011 6:48:34 AM •
1994 GMC Sierra
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Answered
on Jul 22, 2011
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81 views
My 1993 gmc truck wont
Are you getting fuel? if the pump is out then you won't get fuel and it won't start. Check for fuel at the throttle body under the air cleaner also pull a plug and connect it to the wire and ground it to the engine block to see if your getting spark. try this and let me know. I suspect the fuel pump since these last around 8-10 years before they just quit.
7/14/2011 9:11:27 AM •
1994 GMC Sierra
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Answered
on Jul 14, 2011
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688 views
Not finding what you are looking for?
This should help you out ??
