vacuum from the transducer to the egr valve

The egr shouldnt have vacuum at idle so while the car is idling see if there is vacuum going to the egr valve it self?

there is no vacuum from the transducer to the egr valve but there is vacuum from the intake to the transducer if the will help explain

Ok so where is the problem?Is the transducer leaking vacuum or something?Iam trying to figure what your trying to say?

ok the problem is the car runs rough and tries to stall everytime i come to a stop well and idles rough with the vacuum hose on the egr valve so i took the hose off and the car runs great but with the vacuum hose off that means that the egr valve is not allowing the gases to go to the intake to burn again i hope i have explained it correct and you would understand

Ok so with the hose removed from the egr valve your problem is solved?Also at idke there is no vacuum to the egr valve?If sounds like your egr valve is sticking when it opens and is still open when coming to stop even though no vacuum is going to it.

yes but its not open its clesed but i can use a small screwdriver and move the egr valve diegram and it will move freely or hook up and vacuuum hose and suck on it and will open and the car will stall i dont know where to turn or what i should do know should i drive it with out the hose hooked up or is there a nothere problem which is telling the transducer not work any ideas would be helpfull

So does the car ever surge or run rough while driving down the road with the egr hose hooked up?

yes it does in the city driving but when ur on the freeway its fine and the first stop is fin as well but when you come to the second stop it runs rough and tries to stall and you have to add gas before it stalls then you go to take off from the second stop it surgesabd thats with the hose hooked up but when i unhook the hose it runs great even in the city and stops im very confused at this piont

Sounds like your describing a bad egr valve it shouldnt act like that.I have seen them with weak return springs so when they open they open too far too fast.Also would make sense when you come to stop the valve isnt fully closed right away so you stall and run rough.

problem fixed it was the egr valve transducer when bad and not the egr valve but thank you for your help (saturntech9) but one last word for those having the same problem locate the transducer and egr valve and use an hand held vacuum pump and test them both

So the transducer was traping vacuum to the egr valve so it was staying open?Thats why you had to look at the egr like i was saying that it sounded like it was staying open.Without looking at cant the reason its happening.

well the car was fixed and ran great tell last night. now im getting code p0108 and code p0106 any ideas or is it time to get rid of the car thanks for your help

I would start with the code P0108 map sensor voltage too high.Do you have a scan tool that reads live data to read what the map sensor reads with the key in the run position?Thats the first step.

i have a question can a map sensor cause both codes p0106 and p0108 because i bought a map sensor a few weeks ago and put it on and then the egr vavle and transducer and the problem when a way for a few days and then both codes came up and so i did a pressure and volt tst to the map sensor and the new one was bad and the old one was good so i put the old one back in and the car is running good again. should i be look at a nother problem and yes i have a scanner but not sure on how to really run it by the way thank you for taking the time with me to work on my car

Yes the code P0106 is linked to the P0108 code first step in the trouble tree for code P0106 is check the map sensor voltage like i told you to do.What brand and model scan tool do you have?

well the volts that was coming from the pcm was very high and when i add vacuum there was no volts and the scanner tool i has is elmscan for a labtop and with the old map sensor it had 4.5 volts with out vacuum and when i add vacuum the volts went down like i was told

So are those two codes active meaning when you clear them they come right back?

yes they did with the new sensor on it but with the old one on no the have came on and i took the car about ten miles and no codes have came on nor has it tried to stall but i did try to put the new one on again and codes come up and car stalls all the time if that makes sense

Bad new map sensor and you could have just had a bad connection to the map sensor before.If there are no codes qnd its running good now leave it alone and see how it goes.

i plan on it and taking the new bad map sensor back i may not get my money back but i will get a good one and just put it in the shed just in case this old one goes bad thank you so much for taking the time to chat with me about my car

Your welcome thats what were her for helpng people with there cars.Please keep me posted if your car is running good acting up again.I had my sisters saturn do a simlar thing setting a map code moved some wires around it never happened again.Iam not complaining about that one lol i have enough family members cars to fix already lol.Also please tell all your friends about us.

i will keep you posted and i will let my friends know about carpros im just thankiful that i know how to work on cars a well but im not good when it comes to the newer cars and trucks give me a 350 chevy small block and it will run and thanks saturnteck9

Anytime thats what here for.

Saturntech9 the car was running fine tell today and its doing the samething stalling when i start it. Im so angry right now and i did was change the right side lower control arm because the ball joint and i went to start the car and its stalling dont know what to do anymore

Do you have any codes?If so what are the exact code nunbers you have?

engine light is on but no codes at all on the scanner

If the check engine light is on while the engine is running it should have codes in the computer.

it doesnt i have tried a few time and there is no code. i have started it and tried to get a code and i have did it with just the key turned on

What is the map sensor voltage key in the run position engine off?Also with the engine idling?

well i changed the map sensor and now its fine what could be going on with this car. it acts up and i changed it and it does the samething so i change it again and its fine and then it will happen again. could it be a broking wire or bad pcm

voltage to the pcm or the power voltage going in to the sensor

I would say you have a wire going to the map sensor thats close the map sensor that is bad.Probably the copper wire is broken inside the insulation.To me thats the only thing that makes sense at this point.

what do you mean by close the map sensor

I missed a word close to the map sensor.Meaning when you unplug or plug in the map sensor connector you disturb the bad wire.

i understand now. one i mit have a bad wire or two i have a bad plug. so what you are saying is test the wires when i move them around and test that plug to see it one breaks the connection

Heres what i would do put the key in the run position engine off watch the map sensor volts while moving the wired connector etc around.

ok i will go do that now

Keep me posted.

ok i have checked the connection at the sensor and moved around the wires and everything seems tobe fine with the connection and i also checked the voits the power wire was 5 volts and the signal wire was 4.5 volts but im wondering about the ground wire that goes to the sensor

Are these readings with the map sensor plugged in?