Chevy truck problems????

**Dunit35** · 01-15-2006, 03:46 PM

I have a 1991 Chevy s10 4.3 pickup. It broke down on Friday and it turns over but will not start. I checked to see if there was gas coming out of the injectors, there is. I checked to see if I had a spark, It didnt. So I took out the ignition controle moduler and took it to Advanced Auto Parts and had it checked. The guy said it was bad so I replaced it. Now I have a spark but it still wont start? Im not sure how big of a spark there is supposed to be, but you can see it spark. It almost kicks over at the first but then doesnt even come close. I do not know what is wrong with it and I was wondering if anyone knew anything about this problem? I can hear the fuel pump kick on and off. Thanks for any help anyone can give me.

01-15-2006, 03:50 PM

Quote:

Originally Posted by Dunit35

I can hear the fuel pump kick on and off.

Are you supposed to hear that? I don't know. I'm asking.

Fuel filter should be cheap to replace.

To run an engine must have fuel, spark, and oxygen. Which one isn't it getting? Answer that and you'll be able to fix your truck.

Redcoats58 · 01-15-2006, 03:53 PM

Quote:

Originally Posted by Dunit35

I have a 1991 Chevy s10 4.3 pickup. It broke down on Friday and it turns over but will not start. I checked to see if there was gas coming out of the injectors, there is. I checked to see if I had a spark, It didnt. So I took out the ignition controle moduler and took it to Advanced Auto Parts and had it checked. The guy said it was bad so I replaced it. Now I have a spark but it still wont start? Im not sure how big of a spark there is supposed to be, but you can see it spark. It almost kicks over at the first but then doesnt even come close. I do not know what is wrong with it and I was wondering if anyone knew anything about this problem? I can hear the fuel pump kick on and off. Thanks for any help anyone can give me.

The only thing I can think is that maybe when you were changing the ignition module you might have knocked the timing out of whack. Maybe if you fiddle with the timing a little it will start.

**Dunit35** · 01-15-2006, 04:14 PM

Quote:

Originally Posted by Redcoats58

The only thing I can think is that maybe when you were changing the ignition module you might have knocked the timing out of whack. Maybe if you fiddle with the timing a little it will start.

Well I dont have a timing light or anything and I have no clue how to check that. So if it is that I will have to find someone who knows how. Although I did bust a small line that goes from a part on the motor to a filter that is connected to the map sensor?

SLAG · 01-15-2006, 04:16 PM

Quote:

Originally Posted by Dunit35

Well I dont have a timing light or anything and I have no clue how to check that. So if it is that I will have to find someone who knows how. Although I did bust a small line that goes from a part on the motor to a filter that is connected to the map sensor?

if the car is fuel injected and computerized you shouldnt need a timing light the timing is done by the computer and you wouldnt have a distribuitor you would just have coil packs

Eleazar · 01-15-2006, 04:19 PM

Plugs? I'm no expert, but it seems like if the ignition was off they could get fouled pretty quick.

|Zach| · 01-15-2006, 04:19 PM

[Insert strange rival automobile maker alliance based witty remark here]

**Dunit35** · 01-15-2006, 04:19 PM

Quote:

Originally Posted by SLAG02

if the car is fuel injected and computerized you shouldnt need a timing light the timing is done by the computer and you wouldnt have a distribuitor you would just have coil packs

Yeah its fuel injected. I dont have a computer to do it though.

SLAG · 01-15-2006, 04:20 PM

Quote:

Originally Posted by Dunit35

Yeah its fuel injected. I dont have a computer to do it though.

Are you saying you have a Distributior or Coil Packs

**Dunit35** · 01-15-2006, 04:22 PM

Quote:

Originally Posted by SLAG02

Are you saying you have a Distributior or Coil Packs

I hardly know anything about vehicles. I have a distributor cap, does that count?

SLAG · 01-15-2006, 04:26 PM

ok so yes you would need a timing light, Have you replaced the plugs/wires? if not is it time?

stumppy · 01-15-2006, 04:29 PM

Quote:

Originally Posted by Cochise

Plugs? I'm no expert, but it seems like if the ignition was off they could get fouled pretty quick.

Bingo.

I'd bet you have flooded it. You might pull the plugs and see if they are wet with fuel.
If they are wet then I'd leave them out for awhile and let the plugs dry along with letting the cylinders air out a bit.

SLAG · 01-15-2006, 04:30 PM

Here is a helpful Link

http://auto.howstuffworks.com/ignition-system.htm

Oxford · 01-15-2006, 04:53 PM

This system has a distributor cap and rotor. If it is not fouled plugs, then check the rotor and distributor cap for burning or corrosion. If you rotated the distributor that would affect the timing.

FYI, on my 1990 you had to put the system in timing adjust mode to set the base timing. So, you might want to borrow a timing light after you get it running to check your base timing. The module adjusts spark timing, injector timing and duration from there.

**Dunit35** · 01-15-2006, 05:23 PM

Quote:

Originally Posted by Oxford

This system has a distributor cap and rotor. If it is not fouled plugs, then check the rotor and distributor cap for burning or corrosion. If you rotated the distributor that would affect the timing.

FYI, on my 1990 you had to put the system in timing adjust mode to set the base timing. So, you might want to borrow a timing light after you get it running to check your base timing. The module adjusts spark timing, injector timing and duration from there.

I changed the dis.cap, rotor, plugs and wires in probably March. I just now changed a vacuum line that went from something in my motor to some filter that connected to my map sensor. It was busted and still wont start. So I need a timing light then? Hopefully someone I know, knows somebody who has one and knows how to check it.

01-15-2006, 03:46 PM
Dunit35 Keepin it Real Join Date: Sep 2004 Location: Oklahoma Casino cash: $1567045	Chevy truck problems???? I have a 1991 Chevy s10 4.3 pickup. It broke down on Friday and it turns over but will not start. I checked to see if there was gas coming out of the injectors, there is. I checked to see if I had a spark, It didnt. So I took out the ignition controle moduler and took it to Advanced Auto Parts and had it checked. The guy said it was bad so I replaced it. Now I have a spark but it still wont start? Im not sure how big of a spark there is supposed to be, but you can see it spark. It almost kicks over at the first but then doesnt even come close. I do not know what is wrong with it and I was wondering if anyone knew anything about this problem? I can hear the fuel pump kick on and off. Thanks for any help anyone can give me.
Posts: 10,488

01-15-2006, 04:19 PM	#6
Eleazar Beyond the Rapids Join Date: May 2003 Location: Langley, VA Casino cash: $-370000	Plugs? I'm no expert, but it seems like if the ignition was off they could get fouled pretty quick.
Posts: 80,659

01-15-2006, 04:19 PM	#7
\|Zach\| For The Glory Of The City Join Date: Sep 2002 Location: Kansas City Casino cash: $5336768	[Insert strange rival automobile maker alliance based witty remark here]
Posts: 53,433

01-15-2006, 04:26 PM	#11
SLAG Superbowl MVP Join Date: Oct 2005 Location: OOOOOOOOOOOOOLATHE Casino cash: $9910252	ok so yes you would need a timing light, Have you replaced the plugs/wires? if not is it time? __________________ Ad astra per aspera
Posts: 11,177

01-15-2006, 04:30 PM	#13
SLAG Superbowl MVP Join Date: Oct 2005 Location: OOOOOOOOOOOOOLATHE Casino cash: $9910252	Here is a helpful Link http://auto.howstuffworks.com/ignition-system.htm __________________ Ad astra per aspera
Posts: 11,177

01-15-2006, 04:53 PM	#14
Oxford Regular Join Date: Aug 2000 Location: Springfield,MO Casino cash: $9625535	This system has a distributor cap and rotor. If it is not fouled plugs, then check the rotor and distributor cap for burning or corrosion. If you rotated the distributor that would affect the timing. FYI, on my 1990 you had to put the system in timing adjust mode to set the base timing. So, you might want to borrow a timing light after you get it running to check your base timing. The module adjusts spark timing, injector timing and duration from there. __________________ I summon the IRON , Cookin up a whoopin for YOU YOU YOU!
Posts: 1,416