97 K1500 won't start

Bairplayer · 04-05-2007, 11:06 AM

My 97 K1500 truck w/4.3 V6 won't start. Engine cranks, have spark and 45psi on fuel line. Noticed a week or so ago a little harder to start sometimes took several turns of ignition before starting. This morning nothing? Check engine light not on. Any ideas? Would crank position sensor have this effect if faulty? Please help desperate? work truck and no work no money!

bradrhale · 04-05-2007, 11:44 AM

i believe that a crank position sensor would throw a code if it were faulty. i dont know if a mass air flow sensor would throw a code though which would have symptoms like what you are describing. might try testing voltage on it.

03chevy · 04-05-2007, 12:00 PM

on my 03 chevy i had to take it to the dealer because it lost comp memery they had to reprogram both compters one was for the motor and the other was for the tranny and relearn the crank sencer. cost me 250.00 after i replaced the crank,ing. control mod. plugs w/wires and the sencer that's under the rotor in the distrubter and it wouldn't do a thing

436'd skylark · 04-05-2007, 01:18 PM

That might be new enough to require 58-60 PSI fuel pressure. And believe me, it won't even burp with out 55 psi. it will just turn over. I'm not sure of the exact year that nonsense started, but i bet thats your problem. its very frustrating. It wouldn't spark if the crank position sensor was bad.

nnunez · 04-05-2007, 01:46 PM

I had a similar problem once and it ended up being a distributor rotor that was burned.

Bairplayer · 04-05-2007, 02:08 PM

Quote:

Originally Posted by nnunez

I had a similar problem once and it ended up being a distributor rotor that was burned.

If thats the case would I have spark at the plugs? I do.

436'd skylark · 04-06-2007, 10:35 AM

just looked it up, that truck does indeed need the 55-60 psi to start. thats your problem. Believe me, it won't even kick over with out. if you have spark at the plugs, why would you think its a spark problem?

BryanCregger · 04-06-2007, 07:54 PM

maybe a bad fuel pump....try replacing that.

Bairplayer · 04-07-2007, 05:58 PM

Quote:

Originally Posted by 436'd skylark

That might be new enough to require 58-60 PSI fuel pressure. And believe me, it won't even burp with out 55 psi. it will just turn over. I'm not sure of the exact year that nonsense started, but i bet thats your problem. its very frustrating. It wouldn't spark if the crank position sensor was bad.

Can't thank you enough. I would have never thought in a million years. I mean I had pressure 45psi so I thought ok move on. Boy did you save me a lot of aggravation let alone $$$$.

Bairplayer · 04-07-2007, 05:59 PM

Quote:

Originally Posted by BryanCregger

maybe a bad fuel pump....try replacing that.

I did and she fires like a champ. Thanks.

04-05-2007, 11:06 AM	#1
Bairplayer Junior Member Join Date: Apr 2007 Posts: 6	97 K1500 won't start My 97 K1500 truck w/4.3 V6 won't start. Engine cranks, have spark and 45psi on fuel line. Noticed a week or so ago a little harder to start sometimes took several turns of ignition before starting. This morning nothing? Check engine light not on. Any ideas? Would crank position sensor have this effect if faulty? Please help desperate? work truck and no work no money! Last edited by Bairplayer; 04-05-2007 at 11:27 AM.

04-05-2007, 12:00 PM	#3
03chevy Senior Member Join Date: Dec 2006 Location: jax,fl Posts: 991	on my 03 chevy i had to take it to the dealer because it lost comp memery they had to reprogram both compters one was for the motor and the other was for the tranny and relearn the crank sencer. cost me 250.00 after i replaced the crank,ing. control mod. plugs w/wires and the sencer that's under the rotor in the distrubter and it wouldn't do a thing __________________ A dirty mind is a terrible thing to waste!

04-05-2007, 01:18 PM	#4
436'd skylark Senior Member Join Date: Mar 2007 Location: Buffalo Ny Posts: 620	That might be new enough to require 58-60 PSI fuel pressure. And believe me, it won't even burp with out 55 psi. it will just turn over. I'm not sure of the exact year that nonsense started, but i bet thats your problem. its very frustrating. It wouldn't spark if the crank position sensor was bad. __________________ Joe 89 K2500 Chevy, Wee-Oh-five 285K miles, completly rebuilt needs a motor, bad 1962 IHC Scout All Wheel Drive (Scout speak for locking axles) 152 ci, dana everything else

04-06-2007, 10:35 AM	#7
436'd skylark Senior Member Join Date: Mar 2007 Location: Buffalo Ny Posts: 620	just looked it up, that truck does indeed need the 55-60 psi to start. thats your problem. Believe me, it won't even kick over with out. if you have spark at the plugs, why would you think its a spark problem? __________________ Joe 89 K2500 Chevy, Wee-Oh-five 285K miles, completly rebuilt needs a motor, bad 1962 IHC Scout All Wheel Drive (Scout speak for locking axles) 152 ci, dana everything else

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04-05-2007, 11:44 AM	#2
bradrhale Moderator Join Date: Apr 2006 Location: Texas Posts: 2,990	i believe that a crank position sensor would throw a code if it were faulty. i dont know if a mass air flow sensor would throw a code though which would have symptoms like what you are describing. might try testing voltage on it.

04-05-2007, 01:46 PM	#5
nnunez Senior Member Join Date: Dec 2005 Posts: 307	I had a similar problem once and it ended up being a distributor rotor that was burned.

04-06-2007, 07:54 PM	#8
BryanCregger Senior Member Join Date: Mar 2007 Posts: 56	maybe a bad fuel pump....try replacing that.

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