Does the CKP sensor on a 1996 chevy blazer need a variation relearn

Asked by Jul 09, 2015 at 02:10 PM about the 1996 Chevrolet Blazer 2 Door LS 4WD

Question type: Maintenance & Repair

My mechanic recently replaced the CKP sensor on my 1996 chevy blazer with the 4.3 vortec (Vin W) and my vehicle is still running badly, no power, misfires, bad fuel milage. Does the CKP sensor on this vehicleneed a variation relearn.

4 Answers

16,865

No, but it sounds like a fuel injector problem. Do you notice it run really rich? A pressure and leak down test will tell you if it is your problem.

I do not know but the exhaust has been smelling strong lately and these have weird poppet valve injectors. I just had that whole spider assembly under the intake replaced with an updated Delphi unit and a Delphi fuel pump installed. The whole problem started when the truck suddenly was hard to start, it cranked over like the timing was off. So I had a new distributor installed and that didn't fix the problem, and then it went on from there. I was told these blazers do not like any replacement parts but AC Delco and I thought that was just crazy that a vehicle could be that sensitive to replacement parts considering this is not a brand new vehicle. Then I was told it was the Bosch O2 sensors that were installed. Then it was the EGR valve, then the IAC valve. I wish I could nail this problem down.

16,865

Have the fuel pressure and leak down test done and go from there. All you need us a fuel pressure gauge. Your looking for 55psi and it shouldn't drop when the key is off

395

Is this a Federal or California build? It makes a big difference.

Your Answer

Add photo

Related Questions

  • 96 Chevy S10 Blazer with 4.3 L engine vortex will turn over but won't start. Why? 76 answers

    The RPM's fluttered and it died. The PCM code read that it was the crankshaft sensor. We have checked the following: coil - replaced fuses - good control module (ecm) - replaced plug wires - replaced...

    1996 Chevrolet Blazer 4 Door LS 4WD

    -

    Maintenance & Repair

  • missing an maybe out of time 36 answers

    my blazer is acting up like missing bad but only on 3 pistons on my left side of the motor it has new spider injector new gaskets new timing chain in time new distrubotor fuel pump is good plugs r ...

    1996 Chevrolet Blazer 4 Door LT 4WD

    -

    Maintenance & Repair

  • A replaced shift selenoid B did not correct problem on 1999 chev balzer . 3 answers

    An emission test failure showed a shift selenoid B needed replaced. I repaced a new selenoid B ,also using same trans fluid but it still does not auto shift from 1st, 2nd to 3rd while in drive. What o...

    Chevrolet Blazer

    -

    Maintenance & Repair

  • 1992 s10 Blazer fuel issue? 3 answers

    Hey everyone! So, I could REALLY use some help here. I've been searching and 'googling' all damn morning, and can't seem to find much of anything. I have 92 s10 Blazer that I love, but she's been...

    1992 Chevrolet Blazer 4WD

    -

    General

  • 97 chevy 5.7 cam crank relearn 45 answers

    When replacing the distributor on the 5.7 Chevy Vortec enginen, the instruction that came with the Distributor said that a code P1345 would be set, and that a Cam Crank relearn must be performed. Us...

    1997 Chevrolet C/K 1500 Silverado Standard Cab LB

    -

    Maintenance & Repair

Blazer

Looking for a Used Blazer in your area?

CarGurus has 1,297 nationwide Blazer listings starting at $2,000.

ZIP:

Search Chevrolet Blazer Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Chevrolet Blazer Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 1,840
#2 yetilikesbeer
yetilikesbeer
Reputation 1,110
#3 FordNut
FordNut
Reputation 680
View All

Related Models For Sale

Used Chevrolet Tahoe
857 Great Deals out of 27,925 listings starting at $1,700
Used Chevrolet S-10
13 Great Deals out of 1,614 listings starting at $1,800
Used GMC Jimmy
272 listings starting at $3,433
Used Ford Bronco
185 listings
Used Ford Explorer
1,117 Great Deals out of 71,346 listings starting at $799
Used Jeep Grand Cherokee
903 Great Deals out of 66,419 listings starting at $300
Used Chevrolet Camaro
438 Great Deals out of 40,498 listings starting at $3,500
Used Jeep Cherokee
295 Great Deals out of 53,865 listings starting at $2,495
Used Ford F-150
3,035 Great Deals out of 207,199 listings starting at $1,990
Used Chevrolet C/K 1500
1,071 listings starting at $1,250
Used Jeep Wrangler
510 Great Deals out of 18,329 listings starting at $2,900
Used Chevrolet Impala
890 Great Deals out of 35,184 listings starting at $1,700