e30t387

ok so , so far i know i need a new maf sensor, but this morning all these codes came up and i know one of them is a misfire, so if anyone can tell me what i should do to fix this id appreciate it.

po170
po173
po100
po305
po308
po300
po455
po306

thanks guys.

e30t387

just orderd new filters and maf from germanstar, but what can be causing the misfires? Plugs?wires?

blahuh

a really bad maf can cause misfires. You could swap coils and suppressors and see if the misfire follows. I would start with maf and see what happens

e30t387

im waiting of it now, also it only misfires in the morning on my way to work then after about 5 minutes the misfire goes away.

e30t387

i put in the new maf yesterday and it still ran like crap so i left the battery disconected over night and it seems to be running smooth now.

Z06EATER

unplugging the battery is not good for these cars, i'm sure u have either a bad coil or bad sparks, how long has it been since u changed em.? your misfire may return..

e30t387

i changed the spark plugs about 1000 miles ago, coils are original as far as i know, where can i find a decent price on coils.

AMS Performance

po170 = right cyl mixture adaption limit
po173 = left cyl mixture adaption limit
po100 = Mass air sensor
po305 = Cyl 5 misfire
po308 = Cyl 8 misfire
po300 = general misfire
po455 = Purge system major leak, fuel tank pressure sensor voltage supply
po306 = Cyl 6 misfire.

Sounds like you have a lot of issues. Replace mass air sensor & Primary upstream O2 sensors, that should fix most of your problems. Your fuel system may also be dirty, may not be a bad time to check your fuel filter to see if its clogged up, some times that can cause misfire as well.

Hope that helps,
~AMS~

blahuh

Upstream O2 sensors?? May I ask why?

speedybenz

With those misfire codes I would go looking to see that you do not have a vacuum leak. The purge valve tubing may be cracked and so leaking, causing the error code and the misfires, because the cylinders are too lean

Jeff

AMS Performance

Jeff, I agree vacuum leak could potentially cause those problems, especially if its post mass air sensor. But also a bad MAF & O2s can also cause it without any air leak at all which is why I think its a combination of the two (especially since the p0100 code went off which means ECU is basically running blind).

Blahuh - Upstream O2s so most of the A/F monitoring and when they get old they go out of spec and can cause you to exceed adaption limits (as can MAF). If the O2 sensors have anything over 60k miles on them I would definitely replace. Because so many codes are going off I do not think its just one thing, its most likey a combination of parts are worn/old and most likely both the MAF & Primary O2s need to be replaced. (secondaries downstream O2s really only measure to see if the primary cats are working and they would pull up a different code which didn't come up).

Hope that helps,
~AMS~

blahuh

Ya i dunno about that. I understand o2 sensors wear out, but if the airmass voltage is out of spec, that is the cause of the adaptation codes 99% of the time. Misfires are a diff story but I wouldn't start chasing those until known bad components are replaced

Z06EATER

AMS is on to sumting, get some bosch or there is another brand equivalent to bosch but can't put my finger on the name, but they should be cheap online, get 3 new ones, dnt replace just one, because they will have different resistance than them. all must be changed togethor, and wat plugs did u install? they must be bosch platinum 4's or the orginal coppers, the inlines dnt like any other kind or spark plugs, check your vaccum lines, and repace ur 02's and fuel filter, run a can of seafoam through your gas tank...clean her up! nothing may be wrong with the things the car is throwing codes for, the thing about these cars are is when one thing stops working it starts screwing up more stuff, cause it to throw MORE codes, start small and replace little things

e30t387

i replaced the maf, new filters, new fuel filter, and i did have a vacum leak, a hose next to the maf was disconected seems to run fine now, as for the coil pack the cheapest i saw were 130 dollars each witch i cannot afford right now.

Z06EATER

yea they are pricey, ebay has bosch coils,

buy three of these are shop around ebay to find maybe better deals...

http://cgi.ebay.com/ebaymotors/Merce...%3A1|72%3A1171

e30t387

http://cgi.ebay.com/ebaymotors/MERCE...4506.m20.l1116

thos arent for the c43, i found these its 8 of them for $210, does anyone know if these will be ok?

Z06EATER

oh thats right u have a 43,

if it's not bosch dnt get em...you'll be sorry

biitz

Hi everyone!

This is Biitz from UK!

Im new on tis site!...

With those misfire codes I would go looking to see that you do not have a vacuum leak.
The purge valve tubing may be cracked and so leaking, causing the error code and the misfires, because the cylinders are too lean.

Thank's!...