• Welcome to The Truck Stop! We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your diesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • NO ADS! The site is fully functional and ad free!
    CLICK HERE TO REGISTER!

    Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

97 k2500 Chevy 6.5 Dead HELP!!!!!

L

Lenders Marine Services

New Member
Messages
31
Reaction score
0
Location
Merritt Island FL
We have a problem 97 k2500 Chevy 6.5 No Start ... Could use some help;
New Injection pump & PMD ..New Glow Plugs & Crank Sensor. The Fuel tank remoned & cleaned, New Lift Pump Fresh Oil & Fuel Filter, all fuel lines flushed & cleaned. Clean (Fresh) Fuel to IP. Cracked Injectors & fuel at all ... Cleaned all grounds & checked with ohmeter. Checked all wiring.... Has proper voltage in & out of PMD, CKP, all plugs cleaned & checked ... Truck has gear set up on pump drive .. Truck will not fire even with a shot of starting fluid (glow plugs disabled) ....

There is an anamoly I can't figure out ... when the Optical Sensor is unplugged it pumps no fuel whatsoever ... Why??


I would appreciate any help
John B
 
With optic sensor unplugged & no start, believe that could indicate a problem with crank position sensor ( note that youve changed it). If cps is ok it should start in limp mode but may need extended cranking time iirc. Wonder if no fire using starting fluid might indicate a timing problem?
 
Thanks for the reply: My first thought was timing too... Removed the front cover & checked. It is spot on. On the CPS, It was replaced before the pump went bad & worked fine ....Voltage in 5 & out 4.2 ... I guess the end of it could be blocked somehow .. It makes sense if the magnet could not register ... it would not send a signal .. Will Check
thanks
John B
 
Thanks for the reply(s); there is a number 9 resistor in the PMD & and no theft deterrent system .... I would appreciate your expounding on that theory though because the truck does have an elaborate auxiliary brake system for trailer brakes ... We removed the CPS, it was clean & no apparent damage noted ..we will replace it anyway .. plus check continuity in the wiring between the OPS plug & the IP .....

Does anyone know site where I can get a wiring diagram for 1997??
 
If you have fuel being pumped at the injectors and no restriction of airflow, it has got to be timing. Try advancing the IP toward the driver's side.
 
Thanks for the reply; Wehave tried the timing about every way there is to no avail which is not to say you are wrong here .......

What I would like to find the answer to is; When we unplug the Optical Sensor we pump no fuel OK ..... When both the CPS & the Optical Sensor are plugged in we get fuel but when we unplug either one .... No Fuel .. As far as I can tell they do not share a common ground or other wiring that would cause them to be Co-dependant .... Anyone have an answer to this???

John B
 
Obviously if you unplug either one, then there is no fuel.

Sounds like you have to trouble shoot one at a time.

My suggestion is to go back to basic, something was not put properly after changing those parts that you mention or some of the new parts may be defective. Challenge is they were replaced all about the same time so you probably not sure which one cause what?

There is a diagnostic checklist that you can perform from this forum somewhere on the sticky link on the top of the forum. It is a way to go through all the basic stuff and eliminate those first. May be it is not fuel problem, may be it is electrical problem, who knows.

There may be somebody who has the electrical diagram for 97.
 
Did it run before all parts installed or are was all this done for trouble shooting. Could the IP gear to Cam gear be out 180*?
 
JMJ.net; Not so here, you should be able to unplug the Optical Sensor & start the truck in a standby mode right? Also in the alternative you should be able to start the truck with just the Optical sensor .... again, in the standby mode .... We have gone through every check list about 20 times installed 2 different new pumps, 2 new PMD's (one was bad) and then checked every circuit for proper electrical values ... ie PMD, OPS, CPS, Glow Plugs etc. Same with the all the grounds... Thanks for the try .... it all helps
John B
 
Hey Mud Bath: The Truck ran great for two years after I bought it & worked out a few bugs. right up to the time the pump gave out. This whole mess was caused by bad fuel so parts were added incrementally except for a second bad lift pump (bad fuel ate the first one). The wiring is all in good shape & we have yet to find a problem there. We removed the front engine cover & the timing shows spot on .....
Now let me ask you a question; The truck has a timing gear set & it is correct but there is always the possibility that the key on the cam was sheared & then it could be 180 out ... The problem with that is that the truck ran ok (barely running) I backed it in it's spot, the pump then died ... no noise no sign that would indicate a timing problem ...
At 180 out or just clear out of time what else would mess up ..??
 
Lenders Marine Services said:
Thanks for the reply(s); there is a number 9 resistor in the PMD & and no theft deterrent system .... I would appreciate your expounding on that theory though because the truck does have an elaborate auxiliary brake system for trailer brakes ... We removed the CPS, it was clean & no apparent damage noted ..we will replace it anyway .. plus check continuity in the wiring between the OPS plug & the IP .....

Does anyone know site where I can get a wiring diagram for 1997??
Click to expand...

Try here for a wiring diagram. http://www.senecac.on.ca/library/resources/ebsco_arrc.html

The link is also in our technical library.

Art
 
You know where your problem is. You just need to figure out what is causing it. Lack of fuel. Either the parts you replaced on the IP are bad or they are wired incorrectly. However I don't see how they can be wired incorrectly. You can try to replace the opt sensor or the cps or both but the cost of both will run you between $500 - $600. Send DieselPro over at the place a PM. He can get you a rebuilt pump for around $500. Then you know you have a good pump.
 
While you're cranking and try to start, do you notice white smoke at the exhaust tip, smelling unburnt fuel or not ?
You say you get fuel at the injectors but no start, maybe you have non working glow plugs. Do you have glow relay properly connected or functional ?
Did you reconnect fuel line injectors in the right firing order ?View attachment Injector lines.PDF
 
Matuva: Thanks for the tip on Injector lines, will check that but it's almost impossible to connect those in the wrong configuralion ... Worth checking though .. The Glow Plugs are new & working properly ...
John B
 
AK Diesel Driver; Thanks I agree .... the truck was running smooth & quiet when it died & no mechanical noise occured .... when we crank it now compression sounds equal .. Im pretty sure you could diagnose a bad valve by the sound ..... So?
Thanks
John B
 
You must log in or register to reply here.
Back
Top