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zoomsan replied to viper501's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Hi, Since your original post, I was hoping someone would have put up their procedures for the Thermostat replacement. Unless I'm missing it, I don't see it. I've searched the forums and can pretty much piece together things, but would you happen to have the actual procedures from Loren? Just want to make sure I'm identifying the correct location, hoses, etc. Thanks!
zoomsan replied to moosey's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Has anyone considered using airplane paint stripper? This should be available at auto parts stores. Gritblasting will remove a lot of of the material and clean it up, but if there's a chemical solution that won't damage the alloy, why not use it? Especially, if the wheels are aluminum with an anodized coating. The chemical strip won't remove the anodization. The chem strip would be a lot less hands on, but would definitely take more time to remove the paint.
It's the horrible shrieking sound for a second or two at start-up when cold. I have to check the starter first and see if that is the problem. Thanks guys for your help Kristian Hi...any luck in finding out if your problem was caused by your starter?
Thanks a bunch, guys! All great suggestions and I will try the tests suggested. Looks like there are a couple of different schools of opinion, so I'll take the most cautious one. At least there is some explanation and I'm not the only schmuck doing this or experiencing this.
Thanks for the advice. I've been given the same advice and will probably do it, but I'm still not satisfied that something like this shouldn't be happening IF the transmission is OK. If there is something wrong with the tranny, I'd prefer to knock it out before things get too bad.
I have a stock shifter. Actually thought about switching over to a new shifter, but didn't think it would help much.
zoomsan posted a topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Hi Everyone, Every now and then when I'm at a stop and shift from neutral to 1st gear, it's a little difficult to get it into gear. Sometimes I'm able to kinda force the stick into gear, but most of the time, I need to put the transmission back into neutral, lift my foot off the clutch, depress the clutch, and try shifting again. 8 out of 10 times I'm able to get it back into 1st gear. Is this a sign of something horrible about to happen to the transmission? I have 48k on my 99 C2S and other than this, have no other issues with the clutch or transmission. In general, shifting to the other gears is smooth. Any info is greatly appreciated. Thanks!
zoomsan replied to jcpr996's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Hi...so did you not try the jumpering suggested? All you did was take out 1 low speed relay and the car automatically kicked into high speed? Just curious if this is an easier way of seeing low/high speed fan flow differences. I guess a lot of people seem to confuse the low for the high.
What year and model 996 do you have? I verified Lorens temps with the Streather book, but that doesn't mean that they are correct...maybe 102C is not high speed for newer models, but low speed...his book has a few errors w/regards to info for pre-face lift cars vs post facelift, but I'd be surprised on that one. 102C is like 216F..., about right for high speed kick on...but the newer cars do run cooler, so who knows. Is that with your AC on or off? Actually, wrong question, because at those temps the high speed should have already kicked in regardless! That is just way too high if the low speed fans are just kicking on. Really sounds to me like the high speed circuit or the temperature actuation isn't working on yours, doesn't it? You really need to jumper the relay base pins to be sure. I haven't tried stop and go, ( like a Beltway or 95 backup) w/o AC, and there just is never really any S&G traffic in Richmond except 95 at 5:00, and I'm never in it. I know that if I run errands with a lot of S&G around town (lights, stop signs, etc) with AC on, my gauge goes from exactly between the 8 & 0, to a touch more on the 0, which, according to the Autoenginuity software is about 190 to 195. I haven't run errands in 100f weather w/o AC!! But if it's 80F out, like some recent mornings, I have and the temps go only a little higher...still no fans. If those AC fans are running, the hot air wash that comes out directly in front of the front wheels is scathing hot. I haven't put a thermal probe on it, but based on my work around hot air & boilers, I'd guess it is around 160 - 170...really hot. You may have a weak fan or some blockage between the rads and condenser. Like I said, after 38k miles, mine was full of crap, probably 1/4 to 1/3 blocked each side Thanks alot perrinva! You're advice is really helpful. My car is a 99 C2. But, based on some of the descriptions you are saying in your post above, my car seems to be running "normal" with the exception of the low speed fans kicking on. I'll have to give a shot with jumpering out the relays to see the sound and airflow difference between low and high speed to understand what everyone else is talking about. I've already cleaned out my radiators and I think it has helped a little, but not a lot. Since I've never jumpered out the relays, can you please help provide me some guidance? How are you doing it? Are you removing the relays from the sockets and jumpering it out from there? Also, which particular sockets are you jumpering from/to? Thanks again!
zoomsan replied to reckelman's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)If you plan to keep the car for a while, better to pay for the $500-600 now to have this replaced, rather than the $2200-2500 to have it done in the future. Most of the labor is already taken care of during the RMS change.
[ Just the opposite. AC on is low fan mode, ie the series resisitors are switched in. They get smoking hot. >102C is high speed. Only time I've ever seen high speed is by jumpering the relays. Talk about loud fans! Thank you very much for the input! But, I admit I am a bit confused now. Using the OBD hack, I monitor the coolant temp and when it's > 96C, nothing happens. But, when it's > 102C, the fan kicks on, which seems to blow at the same speed & move the same amount of air as when I turn on the AC. I have swapped relays, so I believe they are OK, but have not tried jumpering them and have not been able to verify impedance (missing the test equipment). So, be this the case, when the fan blows with the AC on or what I'm feeling @ > 102C, is it really "low fan mode"?? Or is it that the "high fan mode" kicks in at a even higher temp than 102C?? I have a 2002 c2. Older cars may be different. On my car the AC is definitely the low speed. Easy to tell because A. The resistors are burning hot, so they are "in" the circuit. B. I've jumpered the inputs at the relay, and it is easy to tell the high speed fan vs the low speed ie resistors "out" of circuit. The 2002 and newer cars have a newer rev of the DME, and the OBD hack does not work. (BTW, I assume you mean the HVAC hack, not the OBD. if there is an OBD hack that works on newer cars, I'd like to know what it is!!) I have never been able to verify that the temp switches work. When I get a chance, I hope that my Autoenginuity software will allow me to force them on. I just haven't had time to try it out yet. I've had the car since March, and had to replace the drivers side series resistor, because it was burnt out. Noticed it when on a warm 85F day, w/o AC on , I heard the passenger side fan come on, but not the drivers side. Pulled off the bumper cover, cleaned out TONS of crap from the rads and between rad & condenser and replaced the resistor. Both fans come on with AC and when checked with jumper, but so far have never come on due to coolant temp rise! Maybe this week..it's supposed to be 100F all week. Thanks for the advice! Will try the "temp test" on the resistor with the fans on. I also saw your post on another topic and you mentioned that you couldn't get the car to go above 96C with sprited driving with the 100C weather we've been getting in VA. That kills me because I can maintain <96C (via the HVAC hack) with consistent highway driving, but the temp will go up to 103C in stop and go traffic on 90+ degree days.
Sorry...I'm referring to the radiator fans. The engine compartment fan is a different beast. There's a post here on how to do a mod, if you want to manually turn on your engine bay fan....post #13 http://www.renntech.org/forums/index.php?showtopic=20479
zoomsan replied to zoomsan's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Thanks Loren! Much appreciated! The info on Renntech is really right on, but this particular subject has confused me a bit because I see some conflicting posts. Some people say high speed doesn't come on with AC, others say it does and stage 1 is low speed and stage 2 is high speed, but AC comes on stage 1....not sure who's right. Whatever the case, I'm starting to feel more and more that the ballast is kaput, but wanted to confirm w/ every check I can (without having the ability to verify the electrical conductance), before moving to getting the part or bringing to the shop. Thanks again!
Hi Loren, Does Electric Fan Speed 1 equate to the "high speed" fan speed (i.e. stage 2....relays 20,22) and Electric Fan Speed 2 equate to the "low speed" fan speed (i.e stage 1....relays 19,21)? Thanks! Just the opposite. AC on is low fan mode, ie the series resisitors are switched in. They get smoking hot. >102C is high speed. Only time I've ever seen high speed is by jumpering the relays. Talk about loud fans! Thank you very much for the input! But, I admit I am a bit confused now. Using the OBD hack, I monitor the coolant temp and when it's > 96C, nothing happens. But, when it's > 102C, the fan kicks on, which seems to blow at the same speed & move the same amount of air as when I turn on the AC. I have swapped relays, so I believe they are OK, but have not tried jumpering them and have not been able to verify impedance (missing the test equipment). So, be this the case, when the fan blows with the AC on or what I'm feeling @ > 102C, is it really "low fan mode"?? Or is it that the "high fan mode" kicks in at a even higher temp than 102C??
Hi Loren, Does Electric Fan Speed 1 equate to the "high speed" fan speed (i.e. stage 2....relays 20,22) and Electric Fan Speed 2 equate to the "low speed" fan speed (i.e stage 1....relays 19,21)? Thanks!