johnmasters

Hey guys, I've searched but flame me if this is a stupid question...

I recently purchased a 1990 N/A Vert. Firstly, it seems to take to long to warm-up. If sitting at idle it takes at least 10 minutes for it to drop from 2000rpm to 700rpm. If I crank it and go, I can drive 4 or 5 miles, temp gauge reads normal, stop at a light and its still idling at 1500 or 2000. A few minutes later its down to 700.

It was doing this BEFORE I installed new radiator hoses, thermostat(OEM), and K&N cone filter.

The one thing it seems to do now(after the above was done) is bogg down at low rpm during the first half of the warm-up process.

I would rather just crank and go but I am having to warm up at idle in the driveway because I dont want to bogg down in front of someone while I am pulling off my street.

It would seem like the K&N has something to do with it but I'm not sure what. I had the same filter on my other N/A Vert without the bogging.

Thanks in advance!

arghx

iTrader: (3)

there are coolant lines that go to the throttlebody which affect the cold start system, make sure those aren't kinked or anything.

DavidHolmesIII

The cones do effect idle, but causing it to bog down is unlikely. If its not the cold start system you might want to check the BAC valve. Mine was doing something similar about half the time, replaced the BAC and it stopped...

johnmasters

I WAS worried that the K&N might effect the idle to some degree, however once the car warms up it idles at 700rpm solid just like before. I know very little about the cold start system so I will do some research on that. I will check the BAC but the car runs and idles fine with the heat/air on so I think its probably OK. will adding the intake require the TPS to be readjusted? I hate to mess with the TPS as the car runs great after warm up.

DavidHolmesIII

After having issues with that sort of thing I did a lot of reading here and decided to revert back to the stock intake system with a K&N drop in, It really smoothed everything out. Ive been preaching about it ever since I replaced it. Big difference... Since your modifications pobably dont warrant a performance intake setup, you might be able to correct the air flow differences affecting the TPS, (if thats the problem), by reverting back also. Worked for me anyways...
Good luck.

johnmasters

I think I have read your posts before about reverting back to the drop in. I feel as though there is a small performance increase with the cone and I like the way it sounds and of-course its so much more convenient to get to so I would like to keep it. Although, I will revert if I need to. And, as I said earlier, I did NOT experience the pre warmed-up bog with my last N/A Vert with the same K&N.

DavidHolmesIII

Alright, I did some reading. Sounds like either the BAC or Thermowax. Maybe both...but more than likely just the Thermowax. You right, theres no way the Filter element is causing the bog.

johnmasters

I was thinking that there may be some issue with the thermowax. But, I was thinking that because of the extra long warm up time. Keep in mind... I know little about the thermowax(I'll do my research). I am under the impression that upgrading to the solid pellet will increase warm up time, but I'm not sure. Although the car was taking to long to warm up before the K&N and the bogging started only after the K&N, I believe that these issues may still be related.

Thanks for your time, David.

johnmasters

OK, now that the temp. is above freezing in the morning when I start the car, The bogging seems to be a bit better. I would still like to discuss the long warm-up period. I believe that RTek has a chip that, among other things, defeats the high-RPM idle. does anyone have any experience with such a chip on a non-turbo?