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Car diagnostics

Stuart in MN

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Sep 8, 2005
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Minneapolis
I didn't actually pay attention to where the rotors were made, but unless BMW deeply discounted them and started selling through Advanced auto parts, I would imagine they are the Chinese ones.

Next time around, OEM quality brake rotors for some BMW models are actually pretty fairly priced from some of the online BMW parts vendors. I was surprised at how cheap ATE or Brembo rotors were for my cars.
 
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ManicMechanic

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Sep 23, 2009
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Kentucky
OK guys, I've got a good one for you. I am presently looking at this one at work.
2006 Suzuki Forenza, 2.0 liter, auto trans. Check engine light is on with codes;
P1516- Throttle actuator control (TAC) Module throttle position performance
P2106- Throttle actuator control (TAC) System performance- Throttle limitation active
P2110- Throttle actuator control (TAC) system- Forced limited engine speed
P2135- Throttle position (TP) sensor 1-2 correlation
My OTC Genisys will pull the codes from the PCM, but will not show any data stream from either vehicle specific or OBD2 generic, and will not show me freeze frame data. So I checked all relitive circuits and everything led back to the Throttle body (car is drive by wire) being bad. Called the parts department at Suzuki, and they had the part in stock (one would think that its a common problem then). Replaced throttle body cleared codes, and the car drove fine. Car returned 2 months later with the same codes and sluggish acceleration intermittanly. Checked all circuits, and everything was fine. Warrentied throttle body and car drove fine again, (or so I thought). The car is back with the same friggin problem. My only thought is the sensor an the accel. pedel, but since my scanner will not show me the data stream (any other car it would) I cannot see if there is any voltage diff. between the pedel sensor and the acuator on the throttle body at any givin time. I'm hoping one of you have ever ran into this problem, or have any more ideas. Any help would be appriciated
 
Joined
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Now Leaving , NJ
Usually the simplest answer is the correct one. Check to see if you are running straight water or if is a mix of 50/50. Running just water will make it run cold. Also check your fan clutch, as anyone knows the newer GMs with the electronic fan clutch is a bad design (if it is a GM). What kind of a car is it?
oh ,the sachs clutch on trailblazers that is oem to bmw too ?
if that is stuck on , the truck doesn't want to climb a hill
 

395flash

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Apr 25, 2008
Messages
4
Location
Deer Park, WA
Study up on the code setting criteria for those codes. That should help point you in the right direction. If you dont have access to proper tools(scanner) & info for the vehicle than your gonna be chasing your tail or guessing and that can get expensive, let alone tic off your customer. I wont tell you what my opinion is of the Genisyis.
 

395flash

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Apr 25, 2008
Messages
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Location
Deer Park, WA
One thing I forgot to mention. Dont know if you have access to TSB's for this vehicle, but there might be a reflash for this issue. Something i would definetly look into. Good luck, If you get fixed let us know what it was.
 

checkthisout

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Joined
Sep 5, 2008
Messages
5,232
OK guys, I've got a good one for you. I am presently looking at this one at work.
2006 Suzuki Forenza, 2.0 liter, auto trans. Check engine light is on with codes;
P1516- Throttle actuator control (TAC) Module throttle position performance
P2106- Throttle actuator control (TAC) System performance- Throttle limitation active
P2110- Throttle actuator control (TAC) system- Forced limited engine speed
P2135- Throttle position (TP) sensor 1-2 correlation
My OTC Genisys will pull the codes from the PCM, but will not show any data stream from either vehicle specific or OBD2 generic, and will not show me freeze frame data. So I checked all relitive circuits and everything led back to the Throttle body (car is drive by wire) being bad. Called the parts department at Suzuki, and they had the part in stock (one would think that its a common problem then). Replaced throttle body cleared codes, and the car drove fine. Car returned 2 months later with the same codes and sluggish acceleration intermittanly. Checked all circuits, and everything was fine. Warrentied throttle body and car drove fine again, (or so I thought). The car is back with the same friggin problem. My only thought is the sensor an the accel. pedel, but since my scanner will not show me the data stream (any other car it would) I cannot see if there is any voltage diff. between the pedel sensor and the acuator on the throttle body at any givin time. I'm hoping one of you have ever ran into this problem, or have any more ideas. Any help would be appriciated


The last code is the only relevant code. The other three above that are simply telling you that the engine has gone into limp/limited power/safe mode due to a fault being detected on the APPS circuit.

Three times a charm eh?

It might also be a good idea to check alldata to see if their is an updated calibration for the PCM.
 

BackTracker

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Sep 8, 2009
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Hawaii
Because water is a better conductor of heat than coolant. Coolant actually degrades the cooling properties of the water. On the other hand it does keep it from rotting your engine and freezing. both pretty good positives i'd say.
 

BackTracker

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Sep 8, 2009
Messages
583
Location
Hawaii
friend called me today. 93 toyota camr,. 100k miles on the v6 ,white smoke billowing from tail pipe, barely runs under 2k rpm, massive loss of power. I'm figuring head gasket. or cracke dhead. Car is not overheating thoughts?
 
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ManicMechanic

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Sep 23, 2009
Messages
46
Location
Kentucky
Checked TSB's and couldnot find anything on a PCM reflash, didn't find anything on the condition either. So what are your thought on the OTC scanner? Starting to think it isn't up to par anymore, but it is the latest version (3.0)
 

checkthisout

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Sep 5, 2008
Messages
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Checked TSB's and couldnot find anything on a PCM reflash, didn't find anything on the condition either. So what are your thought on the OTC scanner? Starting to think it isn't up to par anymore, but it is the latest version (3.0)


Just put an APPS in it and call it a day.
 

395flash

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Apr 25, 2008
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Location
Deer Park, WA
OTC scanners have never been up to par. They have led me down the wrong path too many times. There is nothing in the diagnostic charts that point to an APPS. More testing is needed.
 

checkthisout

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Sep 5, 2008
Messages
5,232
OTC scanners have never been up to par. They have led me down the wrong path too many times. There is nothing in the diagnostic charts that point to an APPS. More testing is needed.


Maybe he should send it out to a lab?
 
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ManicMechanic

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Sep 23, 2009
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Kentucky
I never once said that I know everything. As a matter of fact, I said in the original post that either I could help or someone else could. So let me do this, I'll just sit back and listen to yor wisedom....................still waiting. Oh, thats right you just try to bash someone who might have an answer to a question (let me say it once more so that you can understand, MIGHT. sorry folks he's a little hard of hearing at his age). But I guess thats what you get when you mix cheap beer, a keyboard and internet access.
 

krusty the clown

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troll.jpg
 

tcianci

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Feb 7, 2009
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Location
Walpole, Ma
No to hijack the thread, but the mention of scanners brings to mind a story of a neighbor of mine, very car challenged, who had a jeep that wouldn't run right at all, the thing would rev, stumble, stall, straighten out a little, all the gages would jump all over the place. I returned from a vacation and the car was gone. I asked him and he said it was at the garage but it wasn't looking good. He told me that he was going to just donate it. I asked if I could have a crack at it. He said sure. I went to the repair garage and asked for the keys. The owner asked me what I was going to do with it, I told him I was going to fix it and sell it. He laughed out loud at me and said he has had his 2 best guys on it for a week, that the engine was a bone yard replacement from a different year and that it was a "transitional" model of engine computer so that none of the codes were necessarily right. I'll take my chances I told him. The battery was dead and if I jumped it, it would start, and croak as soon as the jumpers were removed. I brought down a charged battery got it to run but even with my foot halfway into it the rpms would vary wildly and it was surging like crazy. They also had bundles of wire hanging out from under the dash, the steering column and in the engine bay. I managed to drive it the 2 miles to my house and proceeded to re assemble all the wiring and such. I got it running again and started watching the battery voltage. It was jumping all over the place and then it would steadily head downhill until all the gages would **** out and then it would eventually do a few more weird revs and then die. The guys had all kinds of voltage information written down on pieces of paper in the truck when I got it. But the main battery voltage jumping all over the place made me curious. I took the alternator down to the local parts jockey and they tested it, the thing was putting out all different voltages at a steady speed. I installed a rebuilt, fired it up and it ran perfectly. I sold it to a guy who does hardwood floors for me occasionally. Over 2 years later I thought to ask him about the truck. "never missed a beat in all the time I've been driving it."
The moral of the story is that although automobiles have all kinds of sophisticated electronics in them these days, some of the same stupid non-computer related stuff that croaked them before computers will still croak them today. Look for the basics, vacuum leaks, bad grounds...alternators with split personalities!
 
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ManicMechanic

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Kentucky
the shop i just started working for has one. i have only used it once but it is nice!

I'd love to replace that stinking genisys of mine with one, but I just can't bring myself to spend 9 grand on it. If ya don't mind, play with it some more and let me know what all it can do (oh boy, I think I see a ****** harrasment lawsuit comming)
 
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ManicMechanic

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Sep 23, 2009
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Kentucky
Does anyone have a problem with lean codes on flex fuel GM's? Ran across one today, ended up being the fuel sending unit. There is a sensor on the fuel level sender that goes bad. just a note if anyone comes across one. Took me a while to figure it out, hopefully this helps someone.....
 

Fedwrench

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Dec 9, 2007
Messages
14,951
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Valley of the sun
I'd love to replace that stinking genisys of mine with one, but I just can't bring myself to spend 9 grand on it. If ya don't mind, play with it some more and let me know what all it can do (oh boy, I think I see a ****** harrasment lawsuit comming)

All of the aftermarket scan tools are at best a compromise regardless of whose name is on it. If you work on mostly GM, buy a Tech 2, you won't regret it and it will pay for itself in a brief amount of time.
 
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ManicMechanic

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Sep 23, 2009
Messages
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Kentucky
All of the aftermarket scan tools are at best a compromise regardless of whose name is on it. If you work on mostly GM, buy a Tech 2, you won't regret it and it will pay for itself in a brief amount of time.

I work on everything from Fords to BMW's, so pretty much whatever rolls into my shop. I need an all around GOOD scanner. If I bought a Tech2, Ford WDS, and all the others, I'd be in the poor house. But I do see your point
 

spazzer

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Apr 18, 2006
Messages
270
Location
Central Valley, California
You have access to a Tech II? Build it as a J-car (aveo) and see if you can access more info that way. Tried clearing the code and doing a wiggle test on the connector? Had an '08 Impala with 2 broken wires on the TB connector, had rubbed on the engine cover.
 
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