Hi I have a 98 blazer and it's got a p1345 cod that stays on and it almost stalls when u take off from a dead stop any ideas wud be helpful thanks

I also did a new fuel pump new wires and I dnt know wat was done to it be for I bought it

 

Did you do the fuel filter as well when you did the pump?

 

no I did not but wud that cause it to use a lot of gas and run rich also at a idle the timing advanced is at 19.5 to 20 at bout 600 rpms

 

Start from the top 2002 4.3 vortec blazer had to remove dizzy when i replaced the lower intake gaskets. Ran good an fine for a while about 2 weeks later engine light came on scanned it with cheep walmart scanner said p1345 so far I have replaced battery, starter, dizzy, cap an rotor as well as plugs just for gen maintenance I feel an know I'm not doing something right but really not shur what some times it starts right up an runs just fine other times it will shutter on start up with many try's to start an then there will be times it will sound as if it's vapor locking while cranking all dash lights an head lights will go off an come back on vin type w

 

Have you tried the fuel filter? Maybe filled up with bad gas at one point and now got degree from the bottom of the tank coming thru the line.

maybe searching up this forum:

need help p1345 code

I doubt that write up while reading this one, it has a lot of point to check out aswell

 

P1345 is camshaft crankshaft correlation. On these trucks, usually it is due to installing the distributor a tooth off. Most every time I've seen it on this forum, that's been the problem. I'd remove and reinstall the distributor being very **** lining everything up correctly. Search the forum and you'll find many posts describing this procedure. Especially take note to posts by "Captain Hook".

 

I am guessing this is a distributor problem..I changed the 4.3 out of my 2000 blazer with a 2002 s10' 4.3 I used my distributor out of the old 4.3 that had lower intake gasket issues...And I liked to never have got that code to go away..I got it close obviously it ran fine didnt really miss/hesitate ect while running.. It would hesitate to start ever so often..Then when it did start I assume the computer ajusted the timing the p1345 would come back and then disappeare ..finally after about 5 attempts of just pulling the distributor out just enough to re seat it..Guess i finally got it never came back again..Thats been 30,000 miles ago.??Are you sure you intalled it for the v6 and not the v8?

 

The P1345 is a distributor installation issue.

 

Exactly, Captain Hook has explained it very well!!!!! If u installed the distributor 1 tooth off it WILL set the P1345 code...... been there done it, simple fix

 

Check the timing. I agree that the dizzy may be off a tooth.