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Dodge Dakota, Truck
#3196 of 4362 Re: 2003 Quad Cab 4.7L 2WD [dataguru]
Mar 04, 2005 (4:49 pm)
The ODBII codes are pretty standard among ALL vehicles. (Socioity of Automotive Engineers standard J2012 )
Here is the listing.
The most common cause for P0440 is a gas cap that is not sealed properly. Make certain that you always put the gascap on tight.
Some folks haver reported that the "guts" of their gascap became so corroded that it would not seal properly... In that case, replace the cap with one from a scrapyard as a cheep fix.
There are many other reasons for the EEC (Everaperatve Emmissiions Control) to flag a failure. In previous appends, I have described the diagnostic tests that take place for the EEC.
Breifly: A small pressure is pumped into the airspace above the fuel in the gastank. If that pressure cannot be maintained, a failure is flagged.
Mar 04, 2005 (6:29 pm)
I am new to this board and I have just purchased a 2002 Dakota Quad Cab w/ a 4.7L engine. I have had it for almost a month now and it has started to run hot on the temp gauge, well it hits the line before the actual red H line. When it does I noticed today that it spits water out from the resivour. Now, is there a bad hose or clamp causing this? Please let me know what you think.
#3198 of 4362 Re: overheating?? [moabovepar]
Mar 04, 2005 (7:50 pm)
I have never heard of any problems with the 4.7L V8 overheating.
I am assuming that you have verified that the cooling system is totally full of liquid and it is STILL exibiting overheating. This means that the hoses and clamps are most likely OK. (or you would not be able to keep liquid in the system) I am also assuming that the belt is turning the water pump properly.
The most common issue would be that somone mixed "regular" antifreeze with the HOAT (Hybred organic Acid Technology) that your 2002 originally came with.
Mixing different types of antifreeze can cause gelling and plugging of the internal passageways of the engine and radiator. This is bad.
DO NOT BELEIVE THE CLAIMS ON ANTIFREEZE BOTTLES THAT THEY ARE COMPATABLE WITH OTHER ANTIFREEZE TECHNOLOGIES!!
My first response to a problem such as this would be to flush the ENTIRE cooling system with distilled water and fill with a 50/50 mix of the correct stuff and distilled water.
While flushing, it would be wise to remove and inspect the thermostat for proper operation.
NOTE: The reason for using distilled water is because the HOAT type of antifreeze can react with minerals in tap-water.
After you are sure that the cooling system is up-to-par and there is *still* overheating, you have a more serious issue. Next things to consider are water pump and head gasket.
#3199 of 4362 Re: 2003 Quad Cab 4.7L 2WD [bpeebles]
Mar 07, 2005 (11:35 am)
Thanks for your valued assistance and feedback. I will bookmark the link for future reference.
The gas cap appears to be quite tight and is the newer updated version. I will try to hunt down your previous postings for explanations of the diagnostic test procedures of the ECC and learn. I guess the number of drive cycles with this condition has activated a hard code to be logged. Now, I'm curious as to what other OBDC codes have been flagged thus far. I do recall a P0121 and P0441 codes previously flagged before this current one.
#3200 of 4362 Torque Converter Lock-up on 45RFE
Mar 08, 2005 (5:58 pm)
Anyone with a Dakota service manual know under what conditions (if any) the torque converter will lock-up in 2nd gear on a 45RFE transmission? Thanks.
#3201 of 4362 Re: Torque Converter Lock-up on 45RFE [sunburn]
Mar 13, 2005 (9:27 am)
I don't believe that the torque converter should ever be in lock-up in 2nd gear. The torque converter is locked-up by the application of the torque converter clutch. The clutch is energized by the Lock-up Solenoid. If lock-up is only occurring in second gear and not in first, I suspect you're TCM is sending a lock-up signal to the solenoid. The solenoid could be defective, I guess, but if you were locked-up I would think you'd experience harsh engagement into Drive and the engine would stall.
#3202 of 4362 Re: Torque Converter Lock-up on 45RFE
Mar 13, 2005 (10:46 am)
I don't have any problems. I was just curious that when I'm towing a trailer up a steep grade in 2nd gear, the torque converter is unlocked. However, this can significantly increase the transmission fluid temps due to the slippage in the torque converter. I was just wondering if the temp got high enough would the torque converter lock up to prevent things from overheating?
#3203 of 4362 Re: Torque Converter Lock-up on 45RFE [sunburn]
Mar 13, 2005 (4:10 pm)
Ah. Okay. The Dakota service manual doesn't specifically state that lock-up doesn't occur in second, but the operation description implies that, as well as it's listed as a fault condition.
I would guess that the torque converter slippage rate would be too small given the gear ratio to load factor to raise the transmission fluid temperature very much. The 545RFE has a dual stage pump and electronic pump pressure control. Torque input is monitored as well as clutch slippage to ensure that slippage is kept very low. I don't know if this applies to the torque converter ( I don't think so...), but clutch slippage is so low on the 545RFE that it probably more than compensates for any heat generated by the torque converter.
Mar 16, 2005 (10:39 pm)
Greetings, I recently bought a 2000 Dakota. At the moment all seems well except for a clockspring being let go type noise coming from the rear. My guess is that it has something to do with the ABS. This only happens when I first start up and drive and after it has sat still for 5+ minutes. I've had the truck for about a month now and just now have noticed the noise. My old Saturn used to make strange noises when first starting out which also was the ABS setting itself.. Any Suggestions? thanks..