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Turns over but won't start

Tiny
TALLCANADIAN
  • MEMBER
  • 1989 GMC JIMMY
  • V8
  • 4WD
  • AUTOMATIC
  • 75,000 MILES
I have a full size jimmy with a 350 engine. The motor turns over, there is spark at the plug. The fuel pump does make it's usual sound when turn on the key. I even poured gas straight down the throttle bottle but it still won't catch. It's -16 celcius here but it's been colder, so I can't see it having any ice in the gas. I used it sunday but this morning it won't fire up. Any help would be appreciated.
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Monday, January 26th, 2009 AT 4:50 PM

8 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Is it possible fouled spark plugs
I would remove and replace the spark plugs

bad gas !
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Monday, January 26th, 2009 AT 5:00 PM
Tiny
TALLCANADIAN
  • MEMBER
  • 4 POSTS
Spark plugs are new. Wires are not new but seem to be okay. If the fuel pump was bad would it still make it's usual hum sound. Also I noticed when I drove it saturday it did stumble a bit once but was fine the rest of the day. Thanks.
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Monday, January 26th, 2009 AT 5:06 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
It is possible to be bad fuel pump
yes it is possible for it to be working and not giving out the pressure needed

see the thing is when put gas down the throttle if it was a fuel issue it should ve starter a bit

but in your case it didnt
you said you have spark
if the spark weak reaching the plugs on a cold day they will foul
reason for me to remove at least one and check
need to have a strong spark at the wire spark plug side
check for a fouled plugs
make sure u have the air filter and cover on
hold gas paddle all the way down and crank the engine to start
good luck
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Monday, January 26th, 2009 AT 6:04 PM
Tiny
TALLCANADIAN
  • MEMBER
  • 4 POSTS
Fooled around with the truck a bit. It is getting gas and spark. Although I have no way of measuring either. I took the distributor cap off just because, and the rotor and cap were well worn, corroded. I replaced those but still won't start. I also took all the plugs out and check them. They are all burning the same and are not fouled or bad. Any other help would be appreciated.
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Sunday, February 1st, 2009 AT 6:52 AM
Tiny
TALLCANADIAN
  • MEMBER
  • 4 POSTS
I've been trying to check my timing chain but when I bring the timing marks together I notice that the distributor does not point at number 1 but looks like number 3. Is this the answer that i'm looking for? Timing chain? Thanks for the any help.
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Sunday, February 8th, 2009 AT 11:56 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
It should be close to # 1
try and turn the distributor
and or pull it out and check drive gear
if timing of, you should had a wrong compression readings


https://www.2carpros.com/forum/automotive_pictures/99387_Graphic1_187.jpg

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Monday, February 9th, 2009 AT 6:13 AM
Tiny
THOMAS EDISON
  • MEMBER
  • 5 POSTS
I'm having the same issue with my 88 same engine same issue did you ever find the problem?
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Monday, May 20th, 2019 AT 12:01 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,347 POSTS
If you turn the key on without cranking the engine over can you hear the fuel pump run in the tank for five seconds? This guide can help:

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.
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Monday, May 20th, 2019 AT 12:57 PM

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