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20:29:24 - 04/18/2024
V8 Dakotas
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91DakotaFreak
Dodge Dakota
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11/07/2002
16:41:46
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 Subject: BIG Problems!!!!!
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Message:
I hav a 91 r/c dak with the 5.2L A500 auto trans and i seem to be having some major problems and ant figure out what is wrong.
When i first bought it i was getting around 250miles to a tank and now i am getting around 170-200miles to a tank. I have little if any throttle response. I do have a throttle body off of the 5.9L but that has not caused that much of a lose in gas mileage it does have the 318 injectors in it and all the sensors. I was progressivly getting worse gas mileage even with the 5.2L tb. so i dont think that that is the problem.
I have replaced the distributor, rotor, plugs, belt, airfilter, radiator, timing chain, water pump, oil gauge sending unit, water temp sending unit, thermostat, egr, and the egr switching solinoid and the tps.
I have check my vacum and got 17 at idle and 17 high/low at 2500 rpm. My throttle response does come and go. I can go out start it now and it will be fine drive it for 30min and its gone and this is when the engine has already run. the only thing i can think of is that its the cat but the dealer and a shop in the area cant figure it out. Oh i am not getting any codes from the comp.
Sorry for the long post but im getting sick of the gas mileage im getting and the performance im getting. I average right now 7-8mpg babying it. i was getting 11-12.
If this will help i bought it in chicago and the guy that owned it did alot of highway driveing and all i do is city driving. Any help would be greatly appreciated.
Thanks
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woodrow
Dodge Dakota
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11/20/2002
21:57:53
|  RE: BIG Problems!!!!!
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Message:
Well,here are some Q's for you have you ever replaced the CAT,if not then do it along with the muffler.Put high flow cat on it.You can buy one from Summit for about 90 bucks. then change the fuel filter.Back to the CAT climb under your truck and beat on it with your fist if it rattles at all it's toast.I have a 93 and had to replace mine.Good luck
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91DakotaFreak
Dodge Dakota
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11/20/2002
22:20:31
| RE: BIG Problems!!!!!
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Message:
I had the truck back pressure tested and it read a 0 on the pressure gauge. so i was told that it was good. I went ahead and removed it and it helped alittle. I changed the filter a few months ago so i dont think that that is the problem. I checked the timing and found that it was at 7 degrees i advanced it to the stock 10 degrees and it made it better i also swithced back to the stock throttle body and that took care of it but i dont know why the 5.9L tb had the hesitation though when i removed it the nipple where the pcv vacum tube was full of gunk so i have really no clue what the problem is. Also what is the RPM that you should be running at 70 mph with 3.55 gears. I am running 2000-2200rpm at 60 and i was running that at 70 now at 70 i run 2200-2500rpm which seems to high but i dont know what may cause that. Is it my lock up solinoid or my clutch packs slipping? any help would be great thanks
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