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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum

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Old 05-08-2006, 07:08 AM   #1 (permalink)
randy b
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Error code

Hey ya all!

Took a long trip this weekend. Used laptop and scanning software to watch codes. Keep getting an error code 44 which relates to an egr system error. Does anyone know what this code means? Do I need to replace the egr valve or some sensor somewhere?

Here are some other numbers:

MPH 75 RPM 2200 Boost 4.5lbs mileage was an average of 20. miles traveled about 1000.

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1994 GMC 1500 4 X 4 Z71 290,000
6.5L turbo diesel, 3.73 rear axle, 4L80-E tranny
17 inch tires & wheels, K&N filter & modified air box,
S engine, 5067 IP, Remoted PMD, 4 inch exhaust
97 cooling upgrade, B&M deep tranny pan
15K trans cooler, Guages-EGT, Trans, Boost, Tach
SSDieselSupply Performance Chip
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Old 05-08-2006, 08:07 AM   #2 (permalink)
quantum mechanic
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The EGR is plumbed to the baro and a vac source (pump). When you pull the line from the EGR at idle and put your finger over the hole and then remove it, the egr should click open or closed, baro must see ~20" vac.

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'96 K3500 srw CC, 4bt IC
929 cast .020" overbored, crank 3.794"' destroked, delta 202 cam, '98 WP, HO oil pump,OBDII/5068 IP
'93 K2500 5spd 599 cast, ported dimond heads, ARP studs,Delta 206 cam, HO WP and Oil 4911 turned up
'94 K3500 (repower?)
'94 C2500 'brub, mostly stock
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