Help! 1999 Chevy Tahoe no start issue!

[Sammie859]

I have a 99 Chevy Tahoe 5.7. I recently had fuel injectors replaced. When I received the truck back to check engine light was still on. I went to AutoZone and had the check engine light checked. Said it was a crankshaft position sensor code. Oh I change the crankshaft position sensor and also went ahead and changed the spark plugs and wires. Now the engine won’t start. It cranks but won’t start! Battery is new. It’s not the alternator. Mechanic that worked on it said it was a spark issue! Any advice?! Opinion? Where do I go from here?!

 

[YukonGTmaster]

Do you recall if the check engine code was a P1345 “Crankshaft Position-Camshaft Position Correlation”. ?

If that is the case, then mostly likely your distributor needs to be adjusted to + or -2 degrees cam retard offset above 1000rpm. I had this issue when I replaced my distributor during my fuel injector spider and lower intake manifold maintenance.

5.7l Vortec Distributor Timing

I just installed a new Bravex Distributor in my 97 Yukon GT 5.7l Vortec after doing the MPFI upgrade. I fiddled around long enough so the distributor body sat somewhat parallel to the intake, and there was no more P1345 code. I got an OBDLink MX Bluetooth scanner with Dash Command App installed...

www.tahoeyukonforum.com

 

[Sammie859]

This is the print out. It was a code P0340

 

[Sammie859]

Do you recall if the check engine code was a P1345 “Crankshaft Position-Camshaft Position Correlation”. ?

If that is the case, then mostly likely your distributor needs to be adjusted to + or -2 degrees cam retard offset above 1000rpm. I had this issue when I replaced my distributor during my fuel injector spider and lower intake manifold maintenance.

5.7l Vortec Distributor Timing

I just installed a new Bravex Distributor in my 97 Yukon GT 5.7l Vortec after doing the MPFI upgrade. I fiddled around long enough so the distributor body sat somewhat parallel to the intake, and there was no more P1345 code. I got an OBDLink MX Bluetooth scanner with Dash Command App installed...

www.tahoeyukonforum.com

 

[Sammie859]

It was a P0340 code

 

[exp500]

P0340 Code is cam posiition sensor in distributor. Was that code present before injector replacement? I hope you used a Delco Crank sensor.
It could possibly be a loose or chafed wire in the distributor at cam sensor, as dist must be removed for injectors. I believe that is one of the reasons P1345 was mentioned above. If P1345 still showing fix that first and cam sensor code may disappear.

 

[Sammie859]

No i don’t believe it wasn’t present before the fuel injectors being replaced. Showed up after. Sorry, I’m new to the forum (today!) so I haven’t quite figured this out.

 

[exp500]

Then replace CAM sensor in distributor. Delco or Delphi.

 

[RED TAHOE LS]

I have a 99 Chevy Tahoe 5.7. I recently had fuel injectors replaced. When I received the truck back to check engine light was still on. I went to AutoZone and had the check engine light checked. Said it was a crankshaft position sensor code. Oh I change the crankshaft position sensor and also went ahead and changed the spark plugs and wires. Now the engine won’t start. It cranks but won’t start! Battery is new. It’s not the alternator. Mechanic that worked on it said it was a spark issue! Any advice?! Opinion? Where do I go from here?!

When was the FUEL PUMP last replaced ?

 

[OR VietVet]

Welcome to the forum from Oregon.

What @exp500 said about that cam sensor. https://www.rockauto.com/en/moreinfo.php?pk=10462464&cc=1353721&pt=7192&jsn=931

Fairly easy to replace and also do a very thorough check of the wires in there. There can get rubbed thru on the insulation over time and even break.

Or go crazy and bite the bullet: https://www.rockauto.com/en/moreinfo.php?pk=4048398&cc=1353721&pt=7108&jsn=914

You said the mechanic said it was a spark problem. Was this after just talking to him/her or after he/she inspected for the problem?

 

[exp500]

It seems by your description it ran after injectors changed. So Test for spark at dist and coil,no spark change cam sensor. Fuel pressure check Key on engine off 62 lbs minimum. Scan for codes, really suspect P1345 is there. Distributor may not have been tightened enough.

 

[Sammie859]

Welcome to the forum from Oregon.

What @exp500 said about that cam sensor. https://www.rockauto.com/en/moreinfo.php?pk=10462464&cc=1353721&pt=7192&jsn=931

Fairly easy to replace and also do a very thorough check of the wires in there. There can get rubbed thru on the insulation over time and even break.

Or go crazy and bite the bullet: https://www.rockauto.com/en/moreinfo.php?pk=4048398&cc=1353721&pt=7108&jsn=914

You said the mechanic said it was a spark problem. Was this after just talking to him/her or after he/she inspected for the problem?

After he changed the plugs and wires. (He’s who worked on it). I bought a new distributor and rotor today. So you think I need to change the camshaft sensor to while I’m at it?

 

[Sammie859]

It seems by your description it ran after injectors changed. So Test for spark at dist and coil,no spark change cam sensor. Fuel pressure check Key on engine off 62 lbs minimum. Scan for codes, really suspect P1345 is there. Distributor may not have been tightened enough.

Yes it ran after the injectors were changed. But it ran “funny” almost like it had a shimmy to it until it got to 160* and the check engine light was on. (Which was why I had it checked at auto zone) and that’s when I got the P0340 code.

 

[OR VietVet]

The camshaft sensor is in the distributor. The distributor you bought should have one in it. The distributor I sent the link for comes with the internals and the rotor and cap. If you bought a distributor and had to buy a separate rotor, is it because the distributor is a stripped down model with no cap and no rotor. Post pics of the distributor and if has a distributor cap on it, take it off and show a pick of the inside. If it has the cam sensor in there, check to see if it looks like the one in the link I sent you. I posted links for just the cam sensor, inside the distributor and the complete distributor.

 

[exp500]

Here is a distributor I have used multiple times, no failures yet. MUST use Delco/Delphi or United DCR820x cap and rotor only.( Others burn thru). Might save a problem later changing Distributor rather than just cam sensor.
More Information for UNITED MOTOR PRODUCTS DCR820X
More Information for UNITED MOTOR PRODUCTS 9362

Since you are now in no start after changing crank sensor, plugs,wires. Do these tests-Spark tester in coil and in dist coil terminal. Post results. Fuel pressure test . Key on engine off 62 lbs minimum. Should hold pressure for 5 minutes minimum. Prefer 20. Rent a Fuel pressure gage at AZ for free. Post results.

 

[wirlybird]

Just to eliminate it as an issue do a pressure check on the fuel pump. There is a fitting on the driver side top of the engine. Or that is where mine is.
My '97 Tahoe ate fuel pumps until I switched to no ethanol gas years back. Haven't replaced a pump since.

 

[Sammie859]

So I’m sending it to the shop today to be diagnosed. So I guess we will see what the problem is later this afternoon. Will keep you posted!

 

[Sammie859]

 

[OR VietVet]

Nice pic but I hate to see that. Never fear, it will run again and you will love it again.

 

[iamdub]

Yes it ran after the injectors were changed. But it ran “funny” almost like it had a shimmy to it until it got to 160* and the check engine light was on. (Which was why I had it checked at auto zone) and that’s when I got the P0340 code.

The injectors are inside the manifold. The distributor is immediately behind the upper half of the manifold that has to be removed. Maybe the tech damaged the wiring going to the cam sensor in the distributor? Or maybe partially unplugged the connector, even inadvertently?

Also, if you've replaced the crankshaft position sensor, it should've had a CKP relearn performed.