MAP Sensor Bad ? | VW Vortex - Volkswagen Forum

Có thể bạn quan tâm

Menu Log in Sign up

Home
Forums
Technical (VW & Audi)
1.8T Engine Forum

Podcast: What I Learned at The World's Best Car Show

dubbboy18t D Recently did a k04 swap and having a few problems.I found a code dealing with the map sensor.The car has about 80000 miles on it . What ae some signs of a bad map sensor? Code wil be up in the AM

#1 · Aug 18, 2009 Recently did a k04 swap and having a few problems.I found a code dealing with the map sensor.The car has about 80000 miles on it . What ae some signs of a bad map sensor? Code wil be up in the AM

See less See more Preview image for a collapsed post.

1 Sort by Oldest first Oldest first Newest first Most reactions #2 · Aug 18, 2009 Re: MAP sensor bad ? (dubbboy18t)

Quote, originally posted by dubbboy18t »

What ae some signs of a bad map sensor?

Sporadic boost, limp mode, No more than 5psi #3 · Aug 19, 2009 Hm , just got a new one .See if this is the problem.Kept throwing a CEL for the MAP #4 · Aug 29, 2009 I think i might be having map sensor problems, my car has like a delay. Is delay what you all refer to as limp mode? #5 · Aug 29, 2009 Re: (MomoJetta) The map sensor gives low boost when fails the sensor gets weak with age and lower boost levels cause the sensor to give false signals to ecu to open wastegate, hense you never get proper boost. Limp mode is vw's protection mode, which cuts boost and timing to avoid engine damage if something fails like a map sesnor if this fails the ecu can't measure boost and cut's engine rpms etc to avoid engine damage. This delay your having you'll need to explain abit more about whats happening, because this could mean anything delay in boost, in acceleration? Delays in boost are normal there are two types What is Turbo Lag? Turbo lag is the time delay of boost response after the throttle is opened when operating above the boost threshold engine speed. Turbo lag is determined by many factors, including turbo size relative to engine size, the state of tuning of the engine, the inertia of the turbo's rotating group, turbine efficiency, intake plumbing losses, exhaust backpressure, etc. What is Boost Threshold? Boost threshold is the engine speed at which there is sufficient exhaust gas flow to generate positive manifold pressure, or boost. Another delay is a boost leak obviously a bad delay. What is a boost leak? A boost leak means that somewhere in the turbo or intake, there is an area where the air (boost) is escaping. Typically a boost leak is caused by a loose or bad seal, cracked housing, etc. When a boost leak is present, the turbo will be able to generate boost, but it may not be able to hold it at a constant level and pressure will drop off proportionally to the size of the leak. Modified by animaniac at 8:10 PM 8-28-2009 #6 · Aug 29, 2009 MAP was mine.. Would run like total crap .Almost like a bad maf.Boost would be cut. Replaced it , runs like a champ #7 · Aug 29, 2009 Re: (animaniac) Well as for my delay, when i go to engage first gear and take off my rpms drop to 600ish and i get a off sound. Like if something is rattling. If i don't gas it will take a bit to take off 3 seconds or so. If i gas and time it correctly no noise at all just takes off. It's also pretty noticeable when i shift to second gear, i shift and it's kind of like it stalled a bit. I have scanned my car a few times. The readings i have gotten vary from Misfire, Low manifold biometric pressure, something about charger to throttle connection, and coolant malfunction. I am gonna be replacing the Coils, spark plugs, and MAF this week coming up and i will be putting up a front mount so if you think a bad MAP could be my problem let me know so i can replace it while i am already down there. #8 · Aug 29, 2009 Low manifold biometric pressure, that would be the same code that i got when my map died #9 · Aug 30, 2009 What about the misfires? #10 · Sep 4, 2009 So limp mode also drops your timing? I just changed the Coils, Plus, and MAF. I still got the same rpm/engaging delay which i think is caused by timing if a bad MAP does mess up your timing. #11 · Sep 4, 2009 Also what are the chances that the harness would go bad on me before the MAP goes bad? Not likely right? #12 · Sep 5, 2009 Help me please #13 · Sep 5, 2009 Re: (MomoJetta) it really wouldn't hurt to change you're map since you'll be swapping the old one over anyway...its only $60? pretty cheap way to start diagnosing a problem..especially if you're throwing a code for it. I would also say clean your MAF sensor and check for vacuum/boost leaks. #14 · Sep 5, 2009 More like 127 since my year model is the cut off when for the other sensor. Well thats what ecs they might be trying to shaft me but w.e. #15 · Sep 5, 2009 Re: (MomoJetta) http://www.germanautoparts.com...431/1 http://www.germanautoparts.com...431/2 #16 · Sep 5, 2009 God bless you man, i hope you get laid tonight i'm gonna cancel that order now if i can #17 · Sep 5, 2009 Re: (MomoJetta)

Quote, originally posted by MomoJetta »

God bless you man, i hope you get laid tonight i'm gonna cancel that order now if i can

Laid, ha, not tonight, I feel like ****. but thanks...check mjmautohaus too, they might be cheaper.. Insert Quotes Post Reply

posts 85M members 1.5M Since 2001 A forum community dedicated to all Volkswagen owners and enthusiasts. Come join the discussion about performance, builds, modifications, classifieds, troubleshooting, maintenance, new releases, and more! Show Less Full Forum Listing Explore Our Forums The Car Lounge Golf IV & Jetta IV Golf III & Jetta III Golf II & Jetta II Golf IV/Jetta IV Parts