<IMG src=smileys/smiley5.gif border="0">I HAVE A 1995 DODGE CUMMINS TURBO DIESEL 2500 4X4 . THE PROBLEM I HAVEIS AT HIGHWAY SPEED ANYWHERE FROM 90 KPH-125 KPH THE RPM WILL SPIKE UP APPROXIMATELY 125-200 RPM WITH NOTICABLE ENGINE REV NOISE, BUT NO ADDED ACCELERATION.THIS SEEMS TO TO BE AN INTERMITANT PROBLEM AS IT WILL HAPPEN FOR ANYWHERE FROM A FEW MINUTES TO UPWARDS OF AN HOUR TO NOT AT ALL. HOPING SOMEONE OUT THERE IN CUMMINS DIESEL WORLD HAS HEARD OF, OR HAS SEEN THE PROBLEM BEFORE, AND MAY HAVE SOME INFORMED OPINION AS THE TECHNIANS IN AND AROUND CALGARY SEEM TO JUST BE GUESSING WHAT THE PROBEM IS AT MY EXPENCE.</P>


THANKING YOU IN ADVANCE FOR ANY ADVICE,</P>


MEK2103@HOTMAIL.COM</P>

not knowing anything about diesels it's hard to say what it could be, but it sounds like some sort of shorting out somewhere between the guage and the engine.

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Also I know how you could gain some horse power from a chip, and I don't mean just 50hp, think bigger. <edited><editID>HEMI TT</editID><editDate>37957.1099652778</editDate></edited>

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INJECTOR PUMP ANEROID PLATE CAN CAUSE THIS. ALSO THE SPOOL SHAFT OF THE TURBO COULD BE LOOSE CAUSING EVCESSIVE REV. DOES THE TRUCK JERK WHEN THIS IS HAPPENING? IS IT A STICK OR AUTOMATIC? IF AUTO. IT COULD BE TORQ. CONVERTER PROBLEMS