Hey i have a 97 12 valve it starts and idles good but when you rev it up quick it misses and when its cold-ish it wont rev past 2200 in neutral. Its better when its warm but it still won't pull past 2200, still revs rough quick but it'll free rev to as far as I'm willing to go. Any suggestions would be much appreciated
Timing slipped. You need a set of specialty tools to set the timing. Do a search for Cummins P-pump timing tools and you'll find what you need.
Next, Here is how you find true TDC of the engine: http://www.cumminsforum.com/forum/94-98-engine/380108-drop-valve-method-find-tdc.html
Once that is established, you remove the #1 cylinder and delivery valve out of the IP and insert your dial indicator. Back the engine up opposite of rotation a bit from your TDC mark so the plunger in the pump is on the base circle of the cam..you'll know you're there when the reading on the dial indicator stops decreasing. Now, rotate the engine the direction of normal rotation. Watch the indicator as you approach TDC. When you get to TDC, stop rotating the engine and note the measurement on the indicator. That number corresponds to the injection timing. There is a chart floating around online someplace that shows you the measurement vs. timing. I have it in hard copy in my toolbox, so maybe someone can post a link to it. If memory serves me correctly, .211" of lift on a 215 horsepower pump at engine TDC equates to 15* timing BTDC.
Timing slipped. You need a set of specialty tools to set the timing. Do a search for Cummins P-pump timing tools and you'll find what you need.
Next, Here is how you find true TDC of the engine: http://www.cumminsforum.com/forum/94-98-engine/380108-drop-valve-method-find-tdc.html
Once that is established, you remove the #1 cylinder and delivery valve out of the IP and insert your dial indicator. Back the engine up opposite of rotation a bit from your TDC mark so the plunger in the pump is on the base circle of the cam..you'll know you're there when the reading on the dial indicator stops decreasing. Now, rotate the engine the direction of normal rotation. Watch the indicator as you approach TDC. When you get to TDC, stop rotating the engine and note the measurement on the indicator. That number corresponds to the injection timing. There is a chart floating around online someplace that shows you the measurement vs. timing. I have it in hard copy in my toolbox, so maybe someone can post a link to it. If memory serves me correctly, .211" of lift on a 215 horsepower pump at engine TDC equates to 15* timing BTDC.
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