hey pwf16129, thanks for the info about the OBDII on my 79 Tasca. I thought for sure it had a hooh up/connection. I reckon not, ha. One more question. Where could I find a set of tires cheap for the same RV? I gather they are pretty pricy. I've had a look at mine and there are some very small, thin cracks on the side near the rim. One side of the Rv is ok but the other side has the cracks. The sticker on the door jam is worn off pretty much. I think the tires on the RV now are not the correct tires. That's according to Sears. I gave them the info from the tires them selves and Sears says they aren't up to snuff for the RV. I have no clue what size to get. The RV is just a tad over 22', duel tires on rear end. Tread looks grate though. They don't ride half bad either. Thaks for your' reply/answer to my OBDII question too. I appreciate it.