Chevy Suburban, 138,000 miles will not start

jcmnh
40

Asked by jcmnh Nov 12, 2012 at 05:19 PM about the 1999 Chevrolet Suburban K1500 LT 4WD

Question type: Maintenance & Repair

It just stopped running at a red light. Will not start, but sounds like it wants to. Starter is fine, alternator is fine, battery
is brand new, plugs are brand new, not the ignition modulator, rotor and distributor cap are fine, coilpak is fine, getting
white spark, sending unit is working, getting fuel pressure, timing chain is fine, we are stumped......

21 Answers

joef
3,565

Could be a bad idle air controler. They fail like that sometimes.

1 out of 1 people think this is helpful.
jcmnh
40

Thank you, I forgot to mention that until this happened the truck was running very smoothly, no issues at all....

John Saffrahn
17,575

How much fuel pressure? Are the injectors receiving a pulse?

jcmnh
40

fuel pressure is at 62, we think it may be the throttle position sensor- got a code for it

John Saffrahn
17,575

Are the injectors receiving a pulse?

jcmnh
40

They are receiving pulse. CHecked fuel pressure with a fuel pressure guage- we have fuel pressure, sending unit is working, spraying ether under the hood does not allow the engine to start even for a second. The throttle position sensor was not the problem- that was the only thing that came up on the computer. All fuses are ok. 6 mechanics are stumped, And in the meantime I have had no vehicle for 15 days.....

John Saffrahn
17,575

What is the compression?

jcmnh
40

I don't know, the truck belongs to me, I am relaying what my mechanic is telling me but Ron is not here right now. Are you talking about the compression with the injectors? Like I might need to rebuild the motor??

John Saffrahn
17,575

Compression of the cylinders.

jcmnh
40

He has not done that, but my truck has not been riding rough at all. Engine is quiet, accelerates smoothly, no bucking, no skipping, nothing that I have noticed at all. The only thing is the serpentine belt makes noise if it is wet, all the pulleys have been changed and the belt is the shorter one of the two for a suburban so it fits tightly enough- edges are not cracked or frayed. I have never sprayed anything on it, either...

John Saffrahn
17,575

Something is being overlooked, air and fuel in the correct mixture is compressed then ignited. Then your engine will run. What is the fuel pressure?

jcmnh
40

62

jcmnh
40

This is so frustrating and everyone is stumped. Unfortunately, I don't have unlimited funds to keep on eliminating issues after changing parts.....

John Saffrahn
17,575

Pull the spider injector out and make sure its working properly is the direction I would go in right now.

John Saffrahn
17,575

Also 62psi is high does it come down while cranking?

jcmnh
40

OK! I will tell him to do that..... thank you....

1 out of 1 people think this is helpful.
jcmnh
40

I will ask about the 62psi when he calls.....

rcrowsnest
0

did you check the main fuse bank on the drivers side under the hood. There is an ignition fuse under there that if it blows the entire engine shuts down.

Bradley Shelledy
815

Will it start with starter fluid?

noniko
0

So what is answer???

jcmnh
40

Because there was spark nobody thought it was the ignition coil, when the truck was put on the diagnostic machine, it still did not show that it could be it. The mechanic just decided to try it and that was all it was. A simple ignition coil.....

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

Suburban
Looking for a Used Suburban in your area?
CarGurus has 19,327 nationwide Suburban listings starting at $2,200.
ZIP:

Search Chevrolet Suburban Questions

Chevrolet Suburban Experts

#1 Eric Fritz
Eric Fritz
Reputation 550
#2 John Saffrahn
John Saffrahn
Reputation 370
#3 Tom Demyan
Tom Demyan
Reputation 320
View All

Related Models For Sale

Used GMC Yukon XL"
369 Great Deals out of 10,368 listings starting at $2,995
Used Chevrolet Tahoe"
965 Great Deals out of 28,480 listings starting at $2,700
Used GMC Yukon Denali"
202 Great Deals out of 6,118 listings starting at $2,995
Used Ford Expedition"
583 Great Deals out of 18,397 listings starting at $2,250
Used GMC Yukon"
341 Great Deals out of 9,378 listings starting at $2,295
Used Cadillac Escalade"
279 Great Deals out of 6,640 listings starting at $2,995
Used Chevrolet Silverado 1500"
2,519 Great Deals out of 170,471 listings starting at $650
Used GMC Suburban"
257 listings starting at $2,988
Used Ford Excursion"
43 Great Deals out of 940 listings starting at $3,390
Used Lincoln Navigator"
151 Great Deals out of 4,771 listings starting at $3,288
Used Ford F-150"
2,993 Great Deals out of 151,626 listings starting at $1,000

Used Cars For Sale

2015 Chevrolet Suburban For Sale
17 Great Deals out of 7,317 listings starting at $42,980
2014 Chevrolet Suburban For Sale
134 Great Deals out of 1,965 listings starting at $28,999
2013 Chevrolet Suburban For Sale
45 Great Deals out of 1,031 listings starting at $22,395
2012 Chevrolet Suburban For Sale
47 Great Deals out of 628 listings starting at $23,490
2011 Chevrolet Suburban For Sale
55 Great Deals out of 1,045 listings starting at $18,888