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Username Post: 2002 Blazer many codes worst 1345, white smoke smells strong of fuel        (Topic#354442)
Skip444 
Poster
Posts: 1

Age: 45
Loc: NEWPORT, PA 17074
Reg: 12-18-18
12-18-18 12:29 PM - Post#2754934    

Po codes 135 155 172 175 300 449 1345.Thick white smoke, raw gas smell. It does have voltage at crank and cam sensors, tested with multimeter. Any suggestions on where to start first would be appreciated.
Never posted on a site so bear with me if I'm doing this wrong.



 




gchemist 
Senior Chevytalk Moderator
Posts: 24894
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
12-18-18 02:23 PM - Post#2754941    
    In response to Skip444

Welcome to the site. White smoke is not good! It's an indication that head gaskets are blown. Worst case, block/heads have a crack. What started all the codes? The first five are all related. P0449 is probably a bad vent valve. The worst is P1345. Has any mechanical work been done to it? Was the timing chain replaced?

First, remove the radiator cap. Next, have someone crank it. Do you see any bubbles? Like large amounts? If so, the head gasket is probably blown. Have you noticed any coolant missing?

Is the crank sensor clean? Was the distributor removed or replaced?

A good source of troubleshooting information.
https://troubleshootmyveh icle.com/

Good videos: https://www.engine-codes.com/p1345_chevrolet.html


'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles


Edited by gchemist on 12-18-18 02:53 PM. Reason for edit: No reason given.

 
toro455 
"4th Year" Silver Supporting Member
Posts: 546
toro455
Loc: Western NY
Reg: 06-15-02
12-19-18 07:42 AM - Post#2755007    
    In response to gchemist

Head gasket or cracked block might be the case but I wonder if it could also be that known troublesome intake manifold gasket.

Scott



 
gchemist 
Senior Chevytalk Moderator
Posts: 24894
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
12-23-18 07:39 AM - Post#2755348    
    In response to toro455

Yea!! Forgot about the notorious intake gasket. Take a flashlight and look at the intake. Follow the line where the head and lower intake meet. If you see water along the line, the lower intake gasket is toast. Read the post at the top of this forum. The post explains how to replace the lower intake gasket. You can remove the upper (plastic) and lower intake pieces together. Great time to replace the spider too. As a 2002 model, it will have the upgraded spider in it.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles


 




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