- This topic has 51 replies, 5 voices, and was last updated 11 years, 3 months ago by
.
-
Topic
-
This is a strange problem as it only happened 2 times. Here is the story.
I was driving my daewoo to the store. When I stopped at a stop sign the car shook violently. Left off the brake it stopped. So i decided to go to a empty parking lot and try to recreate what it did. I turned down the stereo rolled down the window and pushed the brake to a complete stop about 5 seconds later RPMs on the engine went way down I could hear it. It dropped so low the car sputtered for 2 seconds than RPMs went back to normal. This is the 1st time this happened what could it be?
A bit of info that may be helpful: I have about 30% of gas left (a little above 1/4 tank) I had the heat on (its in the 40s) and the car was only about 1/2 to its normal OP temp when this happened,
-
Replies
-
I hope you didn’t remove your MAF…
I just answered a topic with a very similar thing…
Here is the common solution, TPS sensor, Idle control valve, MAF and EGR.
The most helpful information is to tell us the error code you car is producing, remember when you said that you always have a check engine light in your CAI thread? THAT lite is telling you a very profound story.
Take your car to autozone, and ask if they will read your code, most autozones will read the codes from your car for FREE, these codes will tell you almost EXACTLY what your problem is… I think you said your daewoo is a 2000, any car newer than 1996 and older than 2005 is equipped with an OBD-II compliant code diagnostic port… and any OBD-II $30 code reader can read that port. After 2005 (or sometime around this time) the federal law began requiring an all new diagnostic port called “CAN” or as some call it “OBD-III”
CEL is for the CPS its been on since march of 2010. Daewoo’s don’t have EGR i dont think i got a ICV either or a TPS i see no sensors on the TB no idea where the ICV would even be i dont even have a PCV valve
If you live in north america, your car has an EGR and a PCV by federal law, and is illegal to remove and or modify punishable by the feds… You can use VVT instead of an EGR, however, AFAIK the lanos does not have VVT, but it does have a similar approach within the intake manifold to help keep consistent power throughout RPM, this way you have a manifold designed to make power power in high RPMS, but still doesn’t affect low end torque… But this is no replacement for true VVT and still requires an EGR.
All OBD-II compliant cars have A TPS, a MAF and a ICV. They may be hidden, but they are their.
Just check your codes and post them here, the engine lite can have more than one meaning…
any car newer than 1996 and older than 2005 is equipped with an OBD-II compliant code diagnostic port… and any OBD-II $30 code reader can read that port. After 2005 (or sometime around this time) the federal law began requiring an all new diagnostic port called “CAN” or as some call it “OBD-III”
What is the difference between OBD OBD II CAN and DLC? the 1999 VW Bug has a CAN port.
I had the car scanned in 2011 It was Camshaft Position Sensor code but since the car has no problems starting the shop said not to even worry about it.
NO ONE will even tell me how to tell if a CPS is bad or failing Ive asked on here several times ive asked mechanics and used google no luck
[quote=”dohc-kindaguy” post=61190]If you live in north america, your car has an EGR and a PCV by federal law, and is illegal to remove and or modify punishable by the feds… You can use VVT instead of an EGR, however, AFAIK the lanos does not have VVT, but it does have a similar approach within the intake manifold to help keep consistent power throughout RPM, this way you have a manifold designed to make power power in high RPMS, but still doesn’t affect low end torque… But this is no replacement for true VVT and still requires an EGR.
All OBD-II compliant cars have A TPS, a MAF and a ICV. They may be hidden, but they are their.
Just check your codes and post them here, the engine lite can have more than one meaning…[/quote]
I have a PCV i had to replace the hose. but as far a EGR goes there is no way to tell if they are plugged and most cars run better with clogged EGRs. Daewoo Manual states the car does not have EGR.
Okay first off, I’ll start with OBD differences, OBD is kinda like a emissions tear thing, every so
often the feds introduce a new tier of emissions standards… With these new emissions standards
come more complicated computer controlled system with advance Code diagnostic protocols.OBD-I was a pain in the ass that you had to read codes via a flashing light…
OBD-II introduced a computer to read codes as well as using diagnostics to read engines RPM tourqe
and HP output as well as monitoring all sensors and data in real time. It was forced to be used by
1996, some cars manufacturers like Honda and other jumped on it sooner to get it out of the way,
others like ford waited until late 1995 before they added it… Both good and bad as ford took more
time to work on it, but at the same time it took for ever…CAN/OBD-III is more complicated and was forced to be used somewhere around 2006 or something.
It is possible VW just pushed it early, you know them germans 😉=======================================================================================
Onto to other questions, if you CPS is bad then replace it, if it gets to bad the car wont even run… I guess this could be your problem, but I’m still leaning more towards what I said earlier because it’s not happening allot (yet)…
See modern cars use the CPS to know what cylinder to fire and when, if it doesn’t know, then
it can’t do anything…=======================================================================================
As for EGR that is strange, I guess some daewoo did have VVT but I didn’t think the Lanoses did…
But I was able to pull up a part for it on rockauto.com for a 2000 daewoo lanos… However it did
note something about special sport packages using a different part… I didn’t look to closely but
I’d check it out…I still think getting you codes read is a good starting point right now…
Id look at the service manual for your vehicle to identify that part could be a number of things depending on the year. Anything from a vacume compartment for the AC, to a pump for the windshield wipers. Dont know less ya look it up.
I feel so bad for you Leo. Me and you seem to have more problems with our dang rigs these days.lol My rigs radiator cap just went bad which I almost didnt think of it tell I went to put the cap on and noticed the top valve was still fully depressed when that should only happen under pressure.
Okay, I’ve made 2 videos for you to try to help explain things…
Now you NEED TO GET YOUR CODES READ so we know what’s going on, but I’m going to try to explain things in a video to help you, I don’t have a daewoo but I can show you my car, and since all OBD-II compliant cars are very similar, then this may help you… Watch both vids, the first one I’ll be unplugging things and showing things.
In the second video I’ll show you what your parts you don’t know are by looking at google…
Pat 1:
http://www.youtube.com/watch?v=NtQeJAe-1_4Part 2:
http://www.youtube.com/watch?v=k457dG_6mfAIt’s hard to tell how hard the car is shaking in the video when I unplug my sensors, but for the reference it was acting rather erratic…
It’s easier for me just to make a vid then explain
Yes I’m barefoot, yes I walked barefoot on gravel, no I’m not putting shoes on…
Ok i watched your videos just want to say a bit more about this. It has not happened again i took the car for a drive later and i saw the gas guage needle wobble up and down so probably sloshing of the gas pushed some contaminents through the fuel pump slipped past the fuel filter and when into the engine. The Fuel Filter is not due for a replacement yet. I just hit the 42700 mark today and the manual states replace fuel filter every 60,000 miles so that is not due yet. As of october 2011 the CEL is giving the code P0342 i have a never uploaded video explaining this if you shall want to see it let me know. I just spent $10 i barely had to spare getting my new Shift Knob. I will try to obtain a scanner when i have the money to next. Yes i could take it to AutoZone to get it scanned but the only AutoZone in my city is atleast 10 or so miles from where i live. I have a ACDelco part store that is atleast 5 miles away and i have a Advance Auto that is no closer than autozone. However just less than 2 miles away from me i have a NAPA. Do they scan free codes? I also wanted to add it was a challange to watch your videos as I have a PowerMac as my main use machine and with the video private i had to go thru extra steps to download it to my desktop to watch. So no to get onto what you said. The Vacuum line on what you said to be the Fuel Pressure Regulator actually came off the regulator. The car showed no difference when i reconnected the line it stayed the same. The Vacuum Line that was connected to said Regulator goes back to the black Cylinder showen in the blue Lanos. Which leads me to that. The reason you dont see it on my car is because it is atleast a foot down from the top of the firewall so you cannot see it head on which i why i showed it on the blue car. I do have it its just not visable. The loose wiring in the Blue Lanos is the A/C system it is under the black box you see in my car in the same location. I can take pictures in which will better show these parts if it will be easier (since you said it was so small to see).
[quote=”dohc-kindaguy” post=61190]If you live in north america, your car has an EGR and a PCV by federal law, and is illegal to remove and or modify punishable by the feds…[/quote]
This is not true…not all cars have egr valves…an example would be a 91 tbird sc
Well yeah, that is true, but it was more an exaggerated statement, if I you read on you’ll see I mentioned “You can use VVT instead of an EGR”.
Basically yes I know there are other ways, a more modern example is the ford focus SVT that used i-VCT to control the cams and as a result did not need an EGR to pass emissions. However, on lower end economy cars (like my ford focus ZX3) you will not likely see to many vehicles that will pass emissions without an EGR until more recent years, because an EGR is much cheaper to produce than VCT, i-VCT or VVT. Unless the car has extremely mild timing and is designed to pass emissions specifically. And then no one would buy it…
I was pretty sure the daewoo lanos had an EGR though, and removing an EGR is against federal law.
- You must be logged in to reply to this topic.