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Username Post: 2001 Blazer No Spark        (Topic#243966)
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
06-16-10 09:09 PM - Post#1931564    

So I just replaced the 4.3 in my 2001 blazer have everything hooked back up and have no spark. I scanned it and got code P0335. So do I just replace the Crankshaft Position Sensor? I read somewhere else about it needing to be shimmed? It worked fine in the other engine now it won't start PLEASE HELP

Thanks
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
gchemist 
Senior Chevytalk Moderator
Posts: 21872
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
06-17-10 03:28 AM - Post#1931609    
    In response to pudgedawg007

Check for power. Did you set timing mechanically?
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
SleeperSS 
Senior Member
Posts: 2006
SleeperSS
Loc: Spanaway, Wa
Reg: 10-17-04
06-17-10 05:45 AM - Post#1931649    
    In response to gchemist

The dist is non adjustable. It is possible sometimes to get the dist 1 tooth off or 180* off but that wouldn't affect spark...except to have if fire at the wrong time. I'd look for pinched/broken wires or possibly a bad fuse. Another possibility is a bad pick-up coil or ignition module. I'm going to assume spark was checked at the coil also.
'96 S-10 SS
'02 BlaZeR2





 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
06-17-10 04:33 PM - Post#1931880    
    In response to SleeperSS

Yeah I followed the directions for installing the dist to the TEE Because i checked about 6 more times. I checked all the fuses and all are good I checked with a test light for power to the connectors to the coil and ignition module both have power. I had AZ check the coil and they said it was good. As far as getting spark at coil I do NOT have it.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
87MCSS 
Contributor
Posts: 205

Reg: 11-08-09
06-19-10 05:50 AM - Post#1932690    
    In response to pudgedawg007

http://www.obd-codes.com/p0335

Subject:Engine Runs Rough, Service Engine Soon Light On, DTC's P0300 or P0335 Set (Shim Crankshaft Sensor)
Models:2002-03 Chevrolet Astro, Blazer, Express, Silverado and S-10 Truck Models

2002-03 GMC Jimmy, Safari, Savana, Sierra and Sonoma Truck Models

with 4.3L V-6 Engine (VINs W, X - RPOs L35, LU3)


Condition
Some owners may comment on a rough running condition or a Service Engine Soon (SES) light being illuminated. Upon investigation, the technician may find a DTC code P0300 or P0335.


Cause
The crankshaft sensor may be contacting the reluctor wheel.


Correction
Remove the crankshaft sensor. Refer to the Crankshaft Position Sensor Replacement procedure in the Engine Controls-4.3L sub-section of the Service Manual. After removing the sensor, inspect the end of it for witness marks that would indicate contact with the crankshaft. If contact with the reluctor ring is indicated, then inspect the front cover for cracking or other signs of alignment concerns. If the inspection indicates that the cover is causing mis-alignments, replace the cover. If replacing the cover, then the 0.5mm shim is not needed.

If the inspection of the front cover indicates that the cover is not the cause of mis-alignments, then the sensor should be shimmed. Add one shim between the sensor and the front cover. If the concern still exists, then add the second shim. Unless the sensor has been rubbed through the casing or deformed by contact with the crankshaft, it should not be replaced.

In either case, the crankshaft relearn procedure should be performed after any repairs.


Parts Information
Part Number

Description

Qty

12565102

Shim, 0.5mm thick

1-2

12562910

Sensor Crankshaft Position

as req'd

Parts are currently available from GMSPO.


Warranty Information
For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

J4355

Sensor, Crankshaft Position Replace

C/K Truck, M Van

0.2 hr

S/T Truck

0.3 hr

G or L Van

0.4 hr

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
06-19-10 02:06 PM - Post#1932858    
    In response to 87MCSS

So is the 5mm shim going to cause NO spark?
I just ran down the check list for DTC P0335 and still have no spark.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
gchemist 
Senior Chevytalk Moderator
Posts: 21872
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
06-19-10 04:20 PM - Post#1932895    
    In response to pudgedawg007

No. The shime to space off the sensor from touching. I think your ECM is not telling it to fire. Was the spark knock sensor modified. Are the engines the same year model?
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
06-19-10 10:16 PM - Post#1933029    
    In response to gchemist

No the knock sensor was NOT modified. The engine is from the Dealership. The old engine was overheated and had a stuck valve and was running when pulled but not running well. That why it's so frustrating.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
gchemist 
Senior Chevytalk Moderator
Posts: 21872
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
06-20-10 05:37 PM - Post#1933400    
    In response to pudgedawg007

Has the code cleared? Right now, I still suspect the ECM is not telling it to fire. An input is not right. Check the wiring diagrams at www.autozone.com. Start tracing wires. You may find a loose, pinched, or disconnected wire.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
06-24-10 06:59 PM - Post#1935500    
    In response to gchemist

Well I had the truck towed to a mechanic to get it to start cuz I'm fed up with it and need it running. So what do they do? Replace the crankshaft sensor just because the it sent out the DTC that I stated above so now I have to have it towed to a dealer to get it fixed $100 lighter. Is there a security reset or something? I really don't want to have to run down every wire. Sorry had to vent.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
gchemist 
Senior Chevytalk Moderator
Posts: 21872
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
06-24-10 07:18 PM - Post#1935509    
    In response to pudgedawg007

Have you performed a crank relearn procedure?

http://www.fullsizechevy.com/showthread.php?164702...

Search for a crank learn procedure. I don't have my full links on this computer. If I find it, I'll post it.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
06-26-10 07:40 PM - Post#1936635    
    In response to gchemist

No i have not it is sitting at the dealership night drop off lot until monday but I going to head over and try it right now.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
06-27-10 01:03 PM - Post#1936881    
    In response to pudgedawg007

I went and tried it last night the security light was not flashing or even on at all with the ignition on. But I tried any way same result.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
gchemist 
Senior Chevytalk Moderator
Posts: 21872
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
06-27-10 04:09 PM - Post#1936961    
    In response to pudgedawg007

Wow, without looking at the truck I'm stumped. Let us know what they find. I'm curious. It could be something simple or complex.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
06-27-10 09:42 PM - Post#1937166    
    In response to gchemist

I have a feeling it's a broken wire somewhere. Hopefully they don't bend me too far over the barrel.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
Randy_W 
None
Posts: 27804

Reg: 01-06-02
06-28-10 04:57 AM - Post#1937227    
    In response to pudgedawg007

Did you use your old map sensor? I've done a few swaps where the map sensor on the swapped in motor was bad and if it is the injectors won't fire.
Randy

DON'T mess with Old Men, we didn't get old by being, STUPID!!!

"The veneer of civilization is very thin!" (Arlo)


 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
07-01-10 07:44 PM - Post#1939210    
    In response to Randy_W

well supposedly it's the PCM guess I will find ot tomorrow.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
gchemist 
Senior Chevytalk Moderator
Posts: 21872
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
07-02-10 05:58 AM - Post#1939339    
    In response to gchemist

  • gchemist Said:
No. The shime to space off the sensor from touching. I think your ECM is not telling it to fire. Was the spark knock sensor modified. Are the engines the same year model?



I was starting to think so. Well, I wonder how they plan to test it? They may reflash it.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
Zuhar 
Forum Newbie
Posts: 85

Reg: 07-16-09
07-02-10 09:58 AM - Post#1939440    
    In response to gchemist

Just curious.

What are the chances of your PCM failing right as an engine is installed? How often does a PCM fail during normal use?

I know about how often a PCM fails, EVER, but.....

I really want to see the outcome of this. I used to work with a guy that replaced a lot of PCMs/ECMs/BCMs......I was glad to see him go.

 
gchemist 
Senior Chevytalk Moderator
Posts: 21872
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
07-02-10 12:35 PM - Post#1939491    
    In response to Zuhar

I have seen a PCM failure in another vehicle. Both the PCM and ignition failed together. I figured it was some type of short. No warning what so ever. It just died while driving. Both parts were replaced by factory warranty. Freaky incident but failures do happen. Normally due to energy spikes.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
Zuhar 
Forum Newbie
Posts: 85

Reg: 07-16-09
07-05-10 03:26 PM - Post#1940802    
    In response to gchemist

That's about right.
A PCM malfunctioning when the engine is removed? Nope. PCM goes when there is overcharge (over 15 volts).... I could see it. People taking stuff apart and cramming it back together, I see this all the time but it is NEVER actually the ECM. I had a CAT overcharge 2 years ago. My Excursion was hit by lightning so I have done to ECMs since 08, and that seems high to me. When I see a guy ordering a lot of ECMs, I know he's a temp.

 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
07-08-10 11:25 AM - Post#1942370    
    In response to Zuhar

well it turns out I forgot the reluctor wheel when i put the timing cover on. i pulled the engine back out put it on dropped the engine back in. Now when I try to start it cranks like to revs and stops turn the key off it will do it again.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
07-09-10 03:29 PM - Post#1943040    
    In response to pudgedawg007

So it cranks and cranks and cranks engine sounds like it's starting then just dies. I have good spark brand new fuel pump. I have no idea what is wrong.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
Bruces 57 
Frequent Contributor
Posts: 1925

Reg: 01-03-07
07-10-10 11:06 AM - Post#1943367    
    In response to pudgedawg007

Hello;
I'm A stupid person when it comes to computer cars but a van at work had the very same problem! Was running fine one day and wouldn't start the next! Had a Mobile mechanic come, he said it was the "crank sensor" and after he replaced it, it fired right up and has ever since!!

Bruce

 
Zuhar 
Forum Newbie
Posts: 85

Reg: 07-16-09
07-10-10 01:53 PM - Post#1943418    
    In response to Bruces 57

Fords are notorious for crank and cam sensors. They are easy to replace though, and they will show up on the data stream.

Cats have a lot of crank sensors go (they have two) but the engineers set them up so they will run without one. They just won't start on their own. You can start them with a shot of brake clean and drive them into the shop. As long as you don't shut it off you can drive them just fine. Nice!

 
Zuhar 
Forum Newbie
Posts: 85

Reg: 07-16-09
07-10-10 01:55 PM - Post#1943421    
    In response to pudgedawg007

You're almost there.
Something's probably unplugged or grounded.

 
pudgedawg007 
Member
Posts: 93

Loc: NOR*CAL
Reg: 01-15-04
07-12-10 06:48 PM - Post#1944445    
    In response to Zuhar

it has a brand new crank sensor! I am so feed up with this truck. I have changed plenty of engines and never had any problems.
2000 Silverado Z71
2001 S10 Blazer LT
1987 Camaro IROC-Z
1974 K5 Blazer


 
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