Can a loose timing chain cause lack of power?

[Eddy1]

I am having mine replaced in a 95 TD suburban and I am told this was the reason for the lack of power, has anyone ever had that happen to them

[j cAT]

Originally Posted by Eddy1

I am having mine replaced in a 95 TD suburban and I am told this was the reason for the lack of power, has anyone ever had that happen to them

never heard of that one. how about restricted exhaust , fuel pressures/injectors, low compression,restricted intake.

timing chain can be checked by looking at the timing on a machine. best replace if it is worn anyway .

[Eddy1]

Yes all of that was checked and is fine, I am at a loss with this

[jyount]

Not sure what drives the IP, if so then yes. A slack t chain could adversely effect timing. A little timing has a big impact on power.

[Eddy1]

There is a gear on the cam shaft that drives the pump, it just seems hard to believe that a slightly worn chain can cause this much power loss.
I should have it back today I will let you know if that was the problem

[jyount]

Originally Posted by Eddy1

There is a gear on the cam shaft that drives the pump, it just seems hard to believe that a slightly worn chain can cause this much power loss.
I should have it back today I will let you know if that was the problem

Ok, my point is if the cam is driven by it and the pump is off the cam then it is related. Let us know. I know about enough about the older Chevy diesels to avoid em The high pressure DI diesels make roughly twice as much power even stock.....

[Eddy1]

Yes, it is definitely related. I am anxious to see if that's all it was
I will let you guys know

[chuck's]

Having a timing chain to drive the injection pump is not diesel technology. This is one reason to avoid these GM diesels. When the timing chain gets loose, it will have an adverse effect on the injection timing. Timing chains do not last like having a gear driven injection pump. I hope that replacing the chain fixes your problem.
chuck's

[Eddy1]

So I got the truck back, I had the timing chain replaced and the injectors, still no power, although it starts faster with almost no start up smoke and the noise in the front of the engine is gone, the air filter and fuel filter were changed and the riser pump checked and working properly. I also sent a borrow scope down the tail pipe to see if the catalytic converter was clogged and it seemed really clean and all the square were visible. So is there a way to check the injector fuel pump? It does seem to miss a little at higher speeds and my gas millage is not good, it used to be in the high 19 now only 15 MPG. Acceleration if not towing anything is not bad until its gets past 30 miles an hour, could this be the injector pump? I really need this solved

[777stickman]

You might try posting your issues on this forum. These guys are pure diesel fanatics.

http://www.dieselplace.com/forum/index.php

[chuck's]

Is the waste gate stuck open? It should be closed at all times until the ECM senses a high pressure and the will send a signal to the vacuum control solenoid to dump some vacuum to allow the waste gate to open.
chuck's

[jyount]

I know KISS, but has anyone checked compression on this beast?

[j cAT]

Originally Posted by Eddy1

So I got the truck back, I had the timing chain replaced and the injectors, still no power, although it starts faster with almost no start up smoke and the noise in the front of the engine is gone, the air filter and fuel filter were changed and the riser pump checked and working properly. I also sent a borrow scope down the tail pipe to see if the catalytic converter was clogged and it seemed really clean and all the square were visible. So is there a way to check the injector fuel pump? It does seem to miss a little at higher speeds and my gas millage is not good, it used to be in the high 19 now only 15 MPG. Acceleration if not towing anything is not bad until its gets past 30 miles an hour, could this be the injector pump? I really need this solved

awhile back I mentioned the compression test to be sure of this as a cause of low power. now the timing chain and injectors are repaired the starting and smoke on start is much improved which is what I would expect.

the worn leaky injectors will damage the rings and cylinder wall.