multiple errors - pissed off

[unrated_dave]

Well I've been having a lot of codes lately, just decided to take action on them. Ive got the following codes

P0134 - HO2S (front) circuit no activity detected
P0171 - Fuel Trim System too lean
P0401 - EGR Flow insufficient detected
P0131 - HO2S (front) no inversion (low voltage stuck)

I have the CEL, ABS and Parking break lights on in my dash. sometimes the ABS and Park brake goes OFF. but the check engine light remains ON,

I occurred some low RPM on idle. bogging, sometimes goes back revs high then bogs again, sometimes stales. my abs pumps for nothing and then the lights come ON, i think its the rear left speed sensor. but for the bogging and slow throttle response i have no idea. please help me out.

 

[KJ-B]

Well I've been having a lot of codes lately, just decided to take action on them. Ive got the following codes

P0134 - HO2S (front) circuit no activity detected
P0171 - Fuel Trim System too lean
P0401 - EGR Flow insufficient detected
P0131 - HO2S (front) no inversion (low voltage stuck)

I have the CEL, ABS and Parking break lights on in my dash. sometimes the ABS and Park brake goes OFF. but the check engine light remains ON,

I occurred some low RPM on idle. bogging, sometimes goes back revs high then bogs again, sometimes stales. my abs pumps for nothing and then the lights come ON, i think its the rear left speed sensor. but for the bogging and slow throttle response i have no idea. please help me out.

Have you changed your pugs and coil pack? And are you over boosting cause your car will through up the P0171 most of the time if you have a over boost problem. The P0401 EGR may need to be cleaned http://www.mazdas247.com/forum/showthread.php?t=94788. What is the car acting like?

 

[unrated_dave]

I haven't changed anything yet. as for over boosting, I doubt it, everything is stock! I took off the EGR i couldn't clean it since the 4 little screws were stuck so i blocked it off, seems to be running better but still have the engine light. whats the normal idling rpm for a stock protege speed?

 

[KJ-B]

I haven't changed anything yet. as for over boosting, I doubt it, everything is stock! I took off the EGR i couldn't clean it since the 4 little screws were stuck so i blocked it off, seems to be running better but still have the engine light. whats the normal idling rpm for a stock protege speed?

Alright, the idle speed on it should be about 800-1000 is normal. My Protege was running lean cause it was over boosting around 15psi and its all stock also. I had a crack in the piping and the wastegate was stuck closed. Do you have a boost gauge? You need to see what its boosting at and if its anymore then 5psi. It will cause your car to run lean and the engine light to come on.

 

[unrated_dave]

yea i have a boost gauge, not instaled, ill instal it tonight. its mesured in BAR though.

 

[dodgetech81]

your 02 codes are being set because of a lean condition so ignore those

the 401 will be set when the pcm detects too small in manifold pressure change when egr is activated and deactivated.ou more then likely have a vacume leak could be simple as a vacume line
a wastegate could cause the lean code but wouldnt cause the egr code
a bad vacume line going to your egr soleniod could be the cause.
a leaky intake gasket could also cause the codes you have if it was bad enuf
it would also cause the runnability problems your having because the air leaking wherever its coming from is not being registerd by the MAF which means the pcm doesnt realize you actually have more air or (less air coming in if your under boost) into the engine then the MAF says
and the fuel is not being added accordanly
check all your vac lines and if u cant find it then find a shop in your area that has a smoke machine and have them smoke it out

 

[unrated_dave]

Boost gauge reads .5 BAR = 7 psi, A/f gauge reads very lean i noticed a bit of a leak around my turbo..

 

[unrated_dave]

Today heading to work, first start my car it reads optimal mixture. As soon as I start moving it goes very lean. As I keep doing distance I see that my boost is greatly increasing to over 2 bar. Weird it's like it's building pressure. When boosting at 1.5 bar cruising at 70mph I'm running border line optimal/lean. Everything starts and idles fine. With my egr still blocked

 

[KJ-B]

Boost gauge reads .5 BAR = 7 psi, A/f gauge reads very lean i noticed a bit of a leak around my turbo..

A/F gauge is just a light show. Unless its a wideband it will not tell you anything.