'91 Caravan Loses Power (Code 21 & 52)

[jwilliams]

I have a '91 caravan (3.3L) that runs great except for a problem that occurs with power loss at highway speeds +60mph. Vehicle will run very smoothly, then may lose power without warning. It seems as though it is starving for fuel. New fuel pump/filter etc. Mechanics are unable to recreate the problem and diagnose. Computer trouble codes 21 & 52 are present. Problem seems to occur while vehicle changes speeds and perhaps more frequently with cruise on. Does this sound like an O2 sensor issue or maybe fuel inj.? When the problem occurs I can maintain speed of about 45mph but there is no response beyond this. Sometimes, pulling over and shutting down for a few minutes solves problem. Thanks in advance!

[damonerickson]

I have a 1990 Plymouth Voyager 3.0L V6 by Mitsubishi that is giving me a very similar problem to the one you presented here, although I have not yet gone to the trouble of seeking out fault codes. Did you find a solution to this problem?

[Hellcatbyte]

Originally Posted by jwilliams

I have a '91 caravan (3.3L) that runs great except for a problem that occurs with power loss at highway speeds +60mph. Vehicle will run very smoothly, then may lose power without warning. It seems as though it is starving for fuel. New fuel pump/filter etc. Mechanics are unable to recreate the problem and diagnose. Computer trouble codes 21 & 52 are present. Problem seems to occur while vehicle changes speeds and perhaps more frequently with cruise on. Does this sound like an O2 sensor issue or maybe fuel inj.? When the problem occurs I can maintain speed of about 45mph but there is no response beyond this. Sometimes, pulling over and shutting down for a few minutes solves problem. Thanks in advance!

If your codes you are saying are P0021 AND P0052 THE "BOOK" say the following:
1.- P0021 is related to: CAMSHAFT POSITION ACTUATOR A - BANK 2 TIMING OVER ADVANCED and....
2.- P0052 refers to HO2S BANK 2 SEN 1 CIRCUIT HIGH.
Now what it means is that your timing is too far advanced, I bet you havge a very quick response , pick up when accelerating until you reach speed but then it seems to drop off. CHECK YOUR CAMSHAFT TIMING.
As for number two it seems to be related to number 1 but I have no clue.

[Hellcatbyte]

Originally Posted by damonerickson

I have a 1990 Plymouth Voyager 3.0L V6 by Mitsubishi that is giving me a very similar problem to the one you presented here, although I have not yet gone to the trouble of seeking out fault codes. Did you find a solution to this problem?

Not yet, It is not a frecuent fault, it comes, say, when I step really hard on the acclerator, and maybe once every 2 months or so, but as I said if the fault occurs, I just pull aside, or not even pull aside I put it in neutral, I just switch off, and wait for the tachometer to drop to "0" and on again and the problem goes away, I have driven more than 3,000 miles with the problem high way and city and I just do the "routine" when it happens, but I can say that the problem has struck maybe 4 times in a the lapse of 5 months.

We in Monterrey Mexico, about 120 miles south of the border of Laredo TX have as you Americans have, Junk yards and went to ask for a 4 speed trany for my 1997 Voyager (the short) 3.3 engine and they gave me a 500.00 US/DLLS (five hundred) no core required 3 month garantee trans working and in perfect condition, (all voyagers and grand voyagers and all Chrysler vans and some cars are IMPORTED from USA)

But I said well I'll wait to gather some $$$, or if the problem becomes acute.

And as we say $$$$$$ does not grows on trees, I just drive carefully and not overstep the gas pedal, I mean I can step the pedal to the bottom, but not ram it to the bottom if I do, that's when it happens, if you know what I mean