Question about 1997 Chevrolet S-10 Pickup

6 Answers

Trouble code P1345

I have a 97 S-10 with a 4.3L. I just put an engine in it and it is hard starting and when cranking pauses in between cranks sometimes. Once started, it runs pretty smooth but when you bring the idle up, the check engine light comes on and when you check it, it reads P1345 trouble between cam and crank sensor. I replace both. The crappy Haynes manual said that you only need to be withing a few degrees of TDC on the #1 cylinder. Is it possible that I am a tooth off? Would it set a code like that?

Posted by sllyhlly76 on

Ad

6 Answers

Anonymous

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Sniper:

    An expert who has posted more than 50 answers, of which 90% or more were rated as helpful.

  • Expert
  • 77 Answers

Let's back up. On top of the distributor with the cap removed there is an "8" and a "6" on the edge. With the harmonic balancer set with its' mark lined up with the timing pointer of the timing chain cover, the tip of the rotor should be lined up with the "6". If not, remove the hold down bolt, raise the distributor until the rotor can be turned, rotate rotor and set down until rotor of tip lines up with "6". See if it cranks normally then. A worn distributor gear (sharp edges) will also set this code and cause starting problems.

Posted on Apr 29, 2009

  • Anonymous Apr 29, 2009

    Distributor on the 4.3 connot be turned without modifying the hold down clamp. Not suggested to do this.

×

Ad

Stephen Tucker

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 60 Answers

YES BEING A TOOTH OFF will set the code ,, also did you remove dist. ? if so take cap off and look @ mounting area ,,mark your # 1 and drop in ,,,also a worn dist . gear will set this off ,, and if it is a vortec with flat cap, style do you have flat cap or reg. dist cap ??if it is flat cap look on mounting area on dist there are 2 marks , do not line up on # 1 ther will be a 6cyl. mark or an 8 cyl. mark ,, that is tech , your start ( # 1)

Posted on Nov 19, 2009

Ad

Dale Long

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 192 Answers

P1345 GM
Camshaft to crankshaft position correlation fault
The ECM detected that the cam and crank sensor positions were out of time
If your scantool gives the value for cam ******(sometimes called camshaft offset). You have to rev the engine over 1000rpms for it to be accurate. Now to adjust the cam ****** to within spec- 0 degrees +/- 2 degrees, if the value is too negative you turn the distributor counterclockwise and if the value is too positive you would turn it clockwise. If you can't get it to zero, there is a chance the distributor is a tooth off.

Posted on Apr 29, 2009

JOHN LAPIER

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Chevrolet Master
  • 2,601 Answers

I have read all of these answers and all have to do with the symptoms of the problem but not the real problem .
The real problem is the distributor shaft it self . Its plastic on a metal shaft and it wares out to fast .
The 4.3 has 4 main bearings on the crank and 4 bearings on the cam .Yet the factory manaul says going down a bumpy road will set the cam / crankshaft pisition sensors off do to crankshaft wipe.
But the plastic distributor witch the camshaft sensor is located in and the shaft will always run true from the drive gear at the camshaft to the distributor rotor and cap .
Seeing how their is no adjustment at all the base of the distributor to slightly correct for any deveation between the laser sharp corralation that the cam and crankshaft sensors have .then it must be crankshaft wipe.
So I bought a new dist shaft 135 dollars came with cap and rotor all with copper contects and the base was made out of metal not plastic .Then I started micking the 2 old dists shafts that I had and compareing then the tolenances between them and the new one and found them to be so far you 50 to 60 ths at the base and 120 + at the top .
Put the new distributor in end of problem .
I think crankshaft wipe could as bad as Global warming in the futher

Posted on Mar 31, 2015

wheel_man762

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

I have seen this before and am experiencing the exact same thing in a '98 Safari van I just replaced the engine in.The PCM looks for uniformity between the degree of rotation reported by each of these sensors. If they do not agree, the PCM will only be guessing at controlling the engine. You should see a professional who can reset the distributor timing with a computer, that is the only way it will ever be right.

Posted on Jan 29, 2013

Rayray420667

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

How would the distributor have anything to do with the timing between crank and cam? Both sensors read a waveform pattern genrated by both the crank and the cam if those sensors are not in sync with eachother the the code is for cam/crank sensors and the distributor has no effect whatsoever on those positions yes it is related to timing but only so the PCM knows what position the motor is in. Therefore I fail to see how moving the distributor will affect this code

Posted on Nov 19, 2011

  • Rayray420667 Nov 19, 2011

    What I think u need to do is backprobe the connectors at the cam and crank sensors with a lab scope and view the waveforms. Also check the connecters for the appropriate reference voltage. I think this code is most likely due to a bad sensor or a short in the circuit. I can't see how the distributor timing has anything to do with the set mechanical timing between the cam and crank as the only way to change the timing between them would be to take of the timing chain.

×

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Starting problem


Sounds like the check valve in the fuel pump has failed.
You would need to have the fuel pressure checked before and after cranking the engine to verify. The check valve keeps the fuel pressure from draining back into the tank when the engine is off.

May 09, 2013 | Hyundai Accent Cars & Trucks

1 Answer

1989 nissan maxima, cranks, no start


Check sparks, fuel pressure, injectors (should have ac volts while cranking), and if all that is good, check valve timing.
Do It Yourself Diagnosis and Repair

Aug 29, 2017 | Nissan Maxima Cars & Trucks

1 Answer

2001 chevy malibu wont start after the car runs out of gas and we put more gas


It may take 3-4 times cranking for a few seconds,
with a 5 second pause between to get fuel up to the engine. Also may have sucked up
some dirt/debris into the fuel pump after running it dry. May want to change fuel filter.
you can try to have someone bang on the bottom of the tank while someone else
cranks engine. Sometimes this will free up a stuck fuel pump. good-day!!

Aug 05, 2011 | 2001 Chevrolet Malibu

2 Answers

Hard starting when cold ( engine cranks normally )


see if your engine has a ECT sensor (temp sensor that delivers information to your ECM) they are installed on the intake side of the cylinder head, it usually has 2 cables, have it checked replace if necesary

Nov 19, 2009 | 1991 Jeep Wrangler

1 Answer

1998 dodge ram 1500 2w/d fuel enjected


i would put new head gaskets and get the heads check out for hairline cracks and possibly shaved

Jan 11, 2009 | 1989 Dodge D150

1 Answer

Hard to start warm engine


Sounds like you have a problem with your fuel injectors, either they are working to much or not enough once they get warm....

Take it to a shop ant tell them you want the injectors tested.

Nov 21, 2008 | 1996 Subaru Legacy

1 Answer

Engine won't start first time, but will after short pause on second attempt


try this turn key on but don't crank count to five and do it once more now turn key off and then start if it starts right up by doing this the fuel pump is loosing it's prime it has a check valve in the pump that sticks

Oct 18, 2008 | 2001 Chevrolet Silverado

2 Answers

NO START , COLD


have local auto parts store check the battery, it may have a couple bad cells, which would reduce cranking amps... would still have enough to run lights etc., but just not enough juice to start the car...

Aug 29, 2008 | 2003 Pontiac Grand Prix

Not finding what you are looking for?
1997 Chevrolet S-10 Pickup Logo

11,150 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...