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Old 04-28-2007, 07:18 AM   #1
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Unpluged the MAP sensor...

I tried running the car in differnt limp modes by running it one sensor unplugged at a time. Unplugging the MAP brought the GPH (on scangauge) from .5 to .1-.2, yet It says 14.2 PSI at engine off. weather.com says the barometer presure is 29.92 which is the same as 14.7 PSI. Electrical parts are NOT returnable! So I want to be sure before i sink $65 on a new MAP sensor... that this is the part I need to finnally fix it. I don't want to be throwing parts at it.
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Old 04-28-2007, 07:41 AM   #2
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This is on the escort?? did you check to see if any codes are present??
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Old 04-28-2007, 08:27 AM   #3
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I thinks its the daewoo.
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Old 04-28-2007, 08:41 AM   #4
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My Scangage II never reads higher than 14.2
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Old 04-28-2007, 10:29 AM   #5
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Whats it say when the engine is on?
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Old 04-28-2007, 10:41 AM   #6
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Quote:
Originally Posted by caprice View Post
I tried running the car in differnt limp modes by running it one sensor unplugged at a time. Unplugging the MAP brought the GPH (on scangauge) from .5 to .1-.2, yet It says 14.2 PSI at engine off. weather.com says the barometer presure is 29.92 which is the same as 14.7 PSI. Electrical parts are NOT returnable! So I want to be sure before i sink $65 on a new MAP sensor... that this is the part I need to finnally fix it. I don't want to be throwing parts at it.
Wouldn't there be drivability problems if it's the MAP sensor.

I have a Daewoo Lanos(Maybe it's just the way they design um) and the idle has always been a problem. I can't get it below 900 rpm and the MAP is usually between 14.6-14.8. My idle GPH is .4 GPH in P or D and .3 GPH in N. and it's only a 1.6L. It runs like a sewing machine so i finially gave up.
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Old 04-28-2007, 03:04 PM   #7
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Found the problem

This is on the daewoo. the ZX2 runs like a champ.
It had a intermitant (egr) 1404 code. So today I took off the EGR valve to inspect it. The plunger doesn't seal. It is slightly smaller that the hole it is in. I put ducktape to sealit up and put it back on. The car ran instantly better! Smooth and perfect. 4 GPH. I bought another used egr. Put it on and it ran like crap like my other one did. 5-6 GPH I think the engine is only sucking the exaust gasses back into just two cyllenders, hence the lop sided idle. Guess I will just have to deal with it. Also it is going to set a code after 30 minunts of driving.
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Old 04-30-2007, 02:30 AM   #8
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Exclamation Backwards EGR!

The design of the EGR is looks reversible. So I took it off and reinstalled it 180 degrees to what it was. It idles smooth now. I think the vacuum side was on the exhaust side, and the pressure of the exhaust and the vacuum on the other side push the plunger to open, causing a "leaking" EGR valve! This was a very pesky problem no one had an answer to. Searches for Idle problems and "code 1404 Daewoo" turned up nothing.
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