Hi...need help/ideas with 1996 ram
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Hi...need help/ideas with 1996 ram
i just bought this truck from my aunt with a plow, 1996 ram 1500 4x4 ext cab 5.9.
right off the bat is started running pretty bad. we thought is was the temp coolant switch...it was bad but didnt show a code...still ran bad and had codes for both o2 sensors....changed them and the cat with a cheap magnaflow bolt-in off of ebay.
it ran much better...for a day.
then, it ran rough again but gave different codes P0300 and P0305.(why didnt these show up with the o2 codes if the problem was there?) i replaced the cap rotar and the plug wires. the plug wires were very bad( mis-matched sets, ckecked, routed poorly) and i routed them according to the tbs.
ran great and still runs very good but now i have two new codes: P0441 and P1391. the leak i can figure out but the CMP? some things say sensor, some say timing chain, some say the distributor coil or something....which is it? is there a test i can do? any bets on what my next two codes will be after i fix this? why are these codes not showing up at once...i mean, the cat and o2s where bad but so where the plug wires...why didnt i get 4 codes off the bat istead of 2 both times?
right off the bat is started running pretty bad. we thought is was the temp coolant switch...it was bad but didnt show a code...still ran bad and had codes for both o2 sensors....changed them and the cat with a cheap magnaflow bolt-in off of ebay.
it ran much better...for a day.
then, it ran rough again but gave different codes P0300 and P0305.(why didnt these show up with the o2 codes if the problem was there?) i replaced the cap rotar and the plug wires. the plug wires were very bad( mis-matched sets, ckecked, routed poorly) and i routed them according to the tbs.
ran great and still runs very good but now i have two new codes: P0441 and P1391. the leak i can figure out but the CMP? some things say sensor, some say timing chain, some say the distributor coil or something....which is it? is there a test i can do? any bets on what my next two codes will be after i fix this? why are these codes not showing up at once...i mean, the cat and o2s where bad but so where the plug wires...why didnt i get 4 codes off the bat istead of 2 both times?
Last edited by smgbsdc; Jan 21, 2009 at 01:44 PM.
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Over the last few weeks or now after these new codes? And did you replace the plugs and take a look at the old ones? Have you looked for vacuum leaks and solved that problem? And last but not
least have you checked the lower intake gasket? http://dodgeram.info/tsb/2000/09-05-00.htm
least have you checked the lower intake gasket? http://dodgeram.info/tsb/2000/09-05-00.htm
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your aunt had a snowplow ? i think i like her.
ok, sounds like the truck's being a pain.
i copied this off another site. it refers to crank position sensor (over flywheel) or cam position sensor (inside distributor).
ok, sounds like the truck's being a pain.
i copied this off another site. it refers to crank position sensor (over flywheel) or cam position sensor (inside distributor).
Code P1391-Cam or Crank sensor signal is intermittent or missing. Enabling conditions: Engine running over 7 seconds, the alignment of the cam signal does not agree with the crank signal, the MAP reading indicates a drop in vacuum from previous operation. Blocking action: This code can block the following monitors: fuel control, 02 monitor, catalyst monitor, misfire monitor.
Testing: Check for erratic cam and crank signals for 0 to 5 volt digital signal. The crank sensor pick up signal is on the GY-BK wire going to PCM pin C1-8. The Cam pick up signal wire is TN-YL going to PCM pin C1-18. Both sensors share an 5 volt reference supply (VT-WT wire coming from PCM pin C1-17).
The sensor ground for both pickups is a BK-LB wire going to PCM pin C1-4.
another
http://www.actron.com/faq_detail.php?pid=16151&id=16
P1391 Intermittent loss of CMP (camshaft position) or CKP (crankshaft position) signal
Camshaft Position (CMP) sensor and Crankshaft (CKP) sensor signals are monitored with engine running or cranking. Diagnostic Trouble Codes (DTCs) will set in Powertrain Control Module (PCM) memory when the PCM senses failure counter reaches 20 failures for 2 consecutive trips.
Possible causes are:
CKP sensor improperly installed.
Defective CKP sensor.
Defective CMP
Defective PCM
Defective tone wheel/flexplate.
Visually inspect related wiring harness. Check for chafed, pierced, pinched or partially broken wires, defective connectors or defective wiring.
Visually inspect related wiring harness connectors. Check for broken, bent, pushed out or corroded terminals.
Testing: Check for erratic cam and crank signals for 0 to 5 volt digital signal. The crank sensor pick up signal is on the GY-BK wire going to PCM pin C1-8. The Cam pick up signal wire is TN-YL going to PCM pin C1-18. Both sensors share an 5 volt reference supply (VT-WT wire coming from PCM pin C1-17).
The sensor ground for both pickups is a BK-LB wire going to PCM pin C1-4.
another
http://www.actron.com/faq_detail.php?pid=16151&id=16
P1391 Intermittent loss of CMP (camshaft position) or CKP (crankshaft position) signal
Camshaft Position (CMP) sensor and Crankshaft (CKP) sensor signals are monitored with engine running or cranking. Diagnostic Trouble Codes (DTCs) will set in Powertrain Control Module (PCM) memory when the PCM senses failure counter reaches 20 failures for 2 consecutive trips.
Possible causes are:
CKP sensor improperly installed.
Defective CKP sensor.
Defective CMP
Defective PCM
Defective tone wheel/flexplate.
Visually inspect related wiring harness. Check for chafed, pierced, pinched or partially broken wires, defective connectors or defective wiring.
Visually inspect related wiring harness connectors. Check for broken, bent, pushed out or corroded terminals.