Got a Quick, Technical Question?

4965 messages, Last post on Dec 04, 2009 at 9:52 PM

You are in the Maintenance & Repair Forum. Your Host is mr_shiftright

What is this discussion about? Brakes, Electrical, Engine, Exhaust

A Place to Post A Question That Doesn't Need a Discussion--Only One Quick Answer!

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Messages Page 193 of 497: 1; ...; 190; 191; 192; 193; 194; 195; 196; ...; 497; Prev; Next; Last

#1921 of 4965 Re: 2001 Nissan Sentra - replacing multiple oxygen 02 sensors [dlarruso] by alcan Aug 22, 2005 (4:13 pm)
Replying to: dlarruso (Aug 22, 2005 12:42 pm) The scan tool that says that an O2 sensor is defective hasn't been invented yet. First, diagnostic trouble codes refer to sensor circuits, not necessarily the sensors themselves. Second, if there's an engine driveability problem causing the engine to run lean, then the O2 sensors are going to keep reporting a lean mixture and your mechanic can keep replacing them until the threads in the manifolds are worn out without fixing the problem. Find out why it's running lean.
#1922 of 4965 Excessive exhaust by blahzey Aug 24, 2005 (4:38 am)
My 1998 Chrysler concorde (125k) spews out an excessive amount of exhaust upon acceleration and my gas mileage is low. I had the pcv valve replaced by the dealer who said this may fix it or else it may be a valve. I don't drive this car much anymore (approx 1k per month), do you think it might last for another 12-15k? If not is there something inexpensive I can do to get it to last that long? Thanks, Replies to this message: Mr_Shiftright (Aug 24, 2005 8:10 am) blahzey (Aug 27, 2005 11:26 am) Mr_Shiftright (Aug 27, 2005 1:23 pm)
#1923 of 4965 Re: Excessive exhaust [blahzey] by Mr_Shiftright HOST Aug 24, 2005 (8:10 am)
Replying to: blahzey (Aug 24, 2005 4:38 am) Time to stop guessing and throwing parts at the car and get some quantitative data. Not sure what you mean by "excessive exhaust" as this could be BLACK like unburned fuel or BLUE like burning oil----those two colors mean two very different problems. So you'll need to do a cylinder leakdown test to see if you have excessive engine wear and piston ring blow-by, and if not, then a fuel/air analysis/computer scan to see if you are misfiring on one or more cylinders. If you are spewing out unburned fuel, you are going to wreck your catalytic converter pretty darn quick. Replies to this message: blahzey (Aug 27, 2005 11:26 am) Mr_Shiftright (Aug 27, 2005 1:23 pm)
#1924 of 4965 hunter road force balancing machine numbers by edh Aug 24, 2005 (12:23 pm)
what are good and bad numbers? I had my two front 15,000 mileage Kumho tires done- both rims passed radial (up and down) runouts were .005 and .008. the road force with the tires was 17 pounds on one tire - rated as a pass and on the 2nd tire was 26 pounds, rated "marginal" for the tire but the tire/wheel assembly was a "pass" . 1. are these numbers good or bad? 2. what do you pay for a road force hunter 9700 machine balance? Nissan dealer in So Carolina want $40 per tire (!!) Infiniti dealer wants $35 per tire Replies to this message: imidazol97 (Aug 24, 2005 6:08 pm)
#1925 of 4965 Re: hunter road force balancing machine numbers by edh by capriracer Aug 24, 2005 (2:52 pm)
A couple of thoughts: The Hunter machine gave "good" and "bad" indications, which you explained in your post. I think you can trust the machine to be objective. If your rims were measured with the tires still on them, then you didn't get a complete picture of the state of the wheels - just an indication. The best way to measure wheels is with the tires off and then measure exactly where the beads seat. There is a "quirk" in the Hunter machine where it judges wheels to the same criteria as the tires and the assembly. This means that a horrible wheel will "pass". However, what's important is the assembly value. Just keep the wheel peculiarity in mind when trying to judge the wheels by themselves. Hope this helps.
#1926 of 4965 Re: hunter road force balancing machine numbers [edh] by imidazol97 Aug 24, 2005 (6:08 pm)
Replying to: edh (Aug 24, 2005 12:23 pm) When my wheels on my car were being checked for uneven rolling, the dealer sounded like 12 and under were good numbers--but the auto company felt that 18 and under was okay. When they shipped tires that had been prescreened, those tires were 18 and under (I may be off 1-2 units on the 18). On my car when the 3 wheels were below 10 and one was 11 or 12, I could feel a slight uneveness with the 12 on the front. The Hunter suggestion is put the two highest reading tires on the back. I know that 20K later, the wheels and tires are still balanced. This supports my premise that round and balanced tires stay balanced a lot longer (if rotated properly at 6-8 thousand miles).
#1927 of 4965 Re: Got a Quick, Technical Question? [Mr_Shiftright] by ajheavens Aug 25, 2005 (10:05 am)
Replying to: Mr_Shiftright (Dec 28, 2003 2:14 pm) I have a metallic grinding noise when I shift from 1st to 2nd and sometimes 3rd, on a cold engine. This sound is new. Also, the oil and battery lights flash for a second when I start the car - Are they all related? If not, are you at least familiar with the noise? It is freaking me out. Thanks! AJ Replies to this message: Mr_Shiftright (Aug 25, 2005 8:24 pm) ajheavens (Aug 26, 2005 8:38 am) Mr_Shiftright (Aug 26, 2005 8:42 am)
#1928 of 4965 Re: Got a Quick, Technical Question? [ajheavens] by Mr_Shiftright HOST Aug 25, 2005 (8:24 pm)
Replying to: ajheavens (Aug 25, 2005 10:05 am) Alas, I can't hear a thing over here. Noises are really hard to diagnose on a message board. Do you mean the gears are grinding? Replies to this message: ajheavens (Aug 26, 2005 8:38 am) Mr_Shiftright (Aug 26, 2005 8:42 am)
#1929 of 4965 Electrical problem on a chrysler Stratus V6 1995. by marc971 Aug 26, 2005 (7:59 am)
Dear all On a Chrysler Stratus V6 2.5l model 1995, that we have chage the gearbox, we have electrical probems wen we put he engiene on. The screen-wipper, the electrical door locking, and all the dashboard don't work. At time on the dashboard is write "NO BUS" The engine an the new gearbox work well. We ave controlled the fuse, wiring, and relay and we don't find problems. Is someone have an idea. We serch an electrical diagram of this car. If you can send copy of it it will be great. Thanks in adavnce, and sorry for my poor english. We are outside US. Best regards. Marc Replies to this message: alcan (Aug 26, 2005 10:58 am)
#1930 of 4965 Re: Got a Quick, Technical Question? [Mr_Shiftright] by ajheavens Aug 26, 2005 (8:38 am)
Replying to: Mr_Shiftright (Aug 25, 2005 8:24 pm) Not gears grinding, but it sort of sounds like a table saw (or one of those kind of instruments) cutting through wood. That is okay if you cannot identify it - I just wanted to "self-diagnose" before I took it to the car place! Replies to this message: Mr_Shiftright (Aug 26, 2005 8:42 am)