Forkliftaction.com

DISCUSSION FORUMS : Forkliftaction.communicate

My forum profile

Printable version

Discussion Forums Home

Forum:

Mechanical Troubleshooting

Brand: Caterpillar - Model: GC25K OR GP25K

Number of messages: 4

START MESSAGE:

brett_g
Texas, United States

I have a Caterpillar GC25 that when started up idles down to normal until the self test is complete (all of the lights on the dashboard go out) Then the idle speed raises and the check engine light comes on. Due to the lack of computer program and cables and after all the trobleshooting we could do without it, we have swapped most of the fuel system components from a known working unit and have had no luck solving this problem. Has anyone else run into a similar problem on this unit?

Posted 19 Jun 2009 05:41 AM

Report this message

REPLIES:

Sort replies by

proshadetree
Tennessee, United States

Im betting you have a teir 1 fuel system.These units are a pain.If you could tell me where your ecm is,In frount of or behind batery I might be of some help.Also a Serial # will be of some help like 4em045 ect Dont need it all just to help ID the operating system on truck.

Modified 8 Aug 2009 09:22 PM
by poster.

Report this message

edward_t
North Carolina, United States

actually I am betting he has a tier 2, 2004 with an 4g63 or 4g64, (the dash lights not going out right away is the clue), but the serial number sure would be a help.
Since I think this is an impco teir 2, I would also suggest that he disconnect the negative battery cable for about a 1/2 hour, and try it again. I am also wonderin how high the high idle is, as this trucks idle correctly at about 700 RPM but will run with the throttle body disconnected at about 500 rpm.
He may only have a stored major code, that will be cleared via a battery disconnect on this unit.
OR (my better guess) he may have an accelerator pedal sensor mal-adjustment or bad accelerator pot.

-------------------------
webhome = forktechs.com

Posted 8 Aug 2009 09:55 PM

Report this message

proshadetree
Tennessee, United States

Too cool Ed. I missed that. I would asume you are right.

Posted 14 Aug 2009 11:55 AM

Report this message

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

FORUM GLOSSARY

Click for description.

FORUM

DISCUSSION

MESSAGES

NICKNAME

SIGNATURE

FORUMS

Discuss: Industry News & Whispers

Discuss: Conferences, trade shows & other events

Discuss: Mechanical Troubleshooting

Discuss: Technical arena. Did you know? Who knows?

Discuss: Machines. Forklifts, stackers, telehandlers, container handlers and reach stackers

Discuss: Business issues

Discuss: Safety, training & legislation

Discuss: Fun at work