Error code 1222...uht oh.

M20/M30/M50/Whatever! All engine related stuff here.
User avatar
AustinR
I <3 E30's
Posts: 1184
Joined: Wed Dec 07, 2011 2:53 am
AntiSpam: No
Location: Grand Rapids, Michigan
Contact:

Error code 1222...uht oh.

Postby AustinR » Fri May 04, 2012 3:11 am

So I have a few symptoms and issues that I'm thinking could be the same problem.
When the engine is stone cold, it fires up quick and idles smooth. After idling for a couple minutes, it's gets real rough and "lopy" like I've got a big cam or something. Once it get's about half way to running temp, it smooths back out and idles well. Through this, it runs well through the rpm range at any temp.
If the engine has done so much as ran that day (ie. I go to work, park, come out of work after 8 hours, and try to start it) the engine will crank and crank and crank and never start unless I give it a little gas like it's carbureted or something.
On occasion, if I let it idle for a while, the check engine light will come on (though running smooth). If I do so much as blip the throttle, it immediately turns off and then continues to idle smooth with no check engine light.
Yesterday I went on a long-ish road trip (3 hours each way, all highway) and both on the way there and on the way back at about the 75 mile mark and the 140 mile mark it started to hesitate and stutter like I was running out of gas. Both times I had plenty of gas in the tank.
Once I got home I did the stomp test and it showed 1222, which in my searches I found means it was running either excessively rich or lean for more than 10 seconds. Never at any point on the trip did the check engine light come on, even at long idle.
Because of the stutter feeling like I was running out of gas, whenever it happened I stopped and filled up and it was cured, but I think it was more the fact that I was giving it a break as it ran well again as soon as I got off the high way. So when I got close to home and off the highway I gave it hell and floored it, letting it rev up to 5500 and not once did it hesitate at all. Pulled as hard as usual...I don't get it.

At the following site you can see the list of error codes and under 1222 a couple of the possible causes peaks my interest.
http://e30world.com/fuel/BMW-E30-DME-Mo ... ault-codes

1. Incorrect fuel pressure. Some of you may know I have a little issue with the venturi pump system in my tank is plugged, and therefore does not transfer fuel to the pump side of my tank. If i dip below half tank, I start to run out of gas on the pump side. Take a hard left turn and I have gas back. My concern is that because that tube is clogged it is not returning gas to my tank as efficiently, and thus running at higher fuel pressure that it's supposed to.
What is needed to measure fuel pressure so I can check this?

2.Engine temp sensor. Because of the starting at different engine temps issue, as well as the rough idle at certain temperatures, I think the temp sensor could be bad. Does this sound logical?

Sorry for the novel.

Cliff notes:
1. My car is f***ing up.
2. I still love it anyway.
Image
M20_fever wrote:Austin is right.
Nsquared97 wrote:You were right again Austin!
87e30 wrote:Austin is right yet again!

Build Thread
User avatar
M20_fever
Größter Vorsitzender
Posts: 11026
Joined: Fri Feb 27, 2009 1:28 pm
AntiSpam: No
Location: Northern IL

Re: Error code 1222...uht oh.

Postby M20_fever » Fri May 04, 2012 12:56 pm

You can install a fuel pressure gauge at the rail. You can also plumb it to the cabin so you can monitor it when your driving.

My Dads e30 is doing the exact same thing, and throwing the same code.
Image
Midwestern Councel C Prepared class champion 2012
North Suburban Sports Car Club C Prepared class champion 2012
HSAX Instructor

GET YOUR E3P GEAR HERE: http://www.cafepress.com/e3pgearshop
User avatar
Yoshi
Site Admin
Posts: 9087
Joined: Thu Feb 26, 2009 7:47 pm
AntiSpam: No
Location: North VA
Contact:

Re: Error code 1222...uht oh.

Postby Yoshi » Fri May 04, 2012 1:13 pm

One of my last E30s did this. I forget the final fix.

Your coolant temp sensor could be going bad. Your O2 sensor could be going back. You could have a vac leak in something that opens/closes based on heat of rubber.

FPRs rarely go back. I would sooner blame a clogged fuel filter or dying fuel pump. Both of which are possibilities to check. A new walbro 255 will do great and is only $70!
Image
Status: HG repair. 488wtq though!
User avatar
M20_fever
Größter Vorsitzender
Posts: 11026
Joined: Fri Feb 27, 2009 1:28 pm
AntiSpam: No
Location: Northern IL

Re: Error code 1222...uht oh.

Postby M20_fever » Fri May 04, 2012 1:28 pm

Yeah, could be any combination of those. In my dads case he has a new fuel tank, new filter, all new vacuum hoses, and new o2. Gotta check the coolant temp sensor, otherwise probably a.vacuum leak.
Image
Midwestern Councel C Prepared class champion 2012
North Suburban Sports Car Club C Prepared class champion 2012
HSAX Instructor

GET YOUR E3P GEAR HERE: http://www.cafepress.com/e3pgearshop
User avatar
AustinR
I <3 E30's
Posts: 1184
Joined: Wed Dec 07, 2011 2:53 am
AntiSpam: No
Location: Grand Rapids, Michigan
Contact:

Re: Error code 1222...uht oh.

Postby AustinR » Fri May 04, 2012 1:38 pm

It's got a new fuel pump as of last summer. A few new vacuum lines and new intake gaskets. New valve cover gasket.
I'll probably try the coolant temp sensor first and if that's not it I'll check fuel pressure. A new gauge would be fun! haha.
Image
M20_fever wrote:Austin is right.
Nsquared97 wrote:You were right again Austin!
87e30 wrote:Austin is right yet again!

Build Thread
User avatar
ss45466
I <3 E30's
Posts: 645
Joined: Tue Feb 01, 2011 2:50 pm
AntiSpam: No
Location: S.F. NM
Contact:

Re: Error code 1222...uht oh.

Postby ss45466 » Fri May 04, 2012 2:02 pm

Make sure you order the right one, the single pole sensor is for the gauge and the two prong one is for the ecu. I think its the blue one iirc.
User avatar
Yoshi
Site Admin
Posts: 9087
Joined: Thu Feb 26, 2009 7:47 pm
AntiSpam: No
Location: North VA
Contact:

Re: Error code 1222...uht oh.

Postby Yoshi » Fri May 04, 2012 2:37 pm

IMO don't plumb the fuel pressure gauge into the car. the last thing you need is fuel spraying in your face.
Image
Status: HG repair. 488wtq though!
User avatar
M20_fever
Größter Vorsitzender
Posts: 11026
Joined: Fri Feb 27, 2009 1:28 pm
AntiSpam: No
Location: Northern IL

Re: Error code 1222...uht oh.

Postby M20_fever » Fri May 04, 2012 3:21 pm

That's why they make electric fuel pressure gauges.
Image
Midwestern Councel C Prepared class champion 2012
North Suburban Sports Car Club C Prepared class champion 2012
HSAX Instructor

GET YOUR E3P GEAR HERE: http://www.cafepress.com/e3pgearshop
User avatar
AustinR
I <3 E30's
Posts: 1184
Joined: Wed Dec 07, 2011 2:53 am
AntiSpam: No
Location: Grand Rapids, Michigan
Contact:

Re: Error code 1222...uht oh.

Postby AustinR » Sat Jun 16, 2012 8:14 pm

Ok so I recently moved, as most of you know, so I had to put this little issue on break.
Today I adjusted my valves. I wasn't thinking it would fix this 1222 problem, but I figured it needed to be done and I wasn't doing anything today. In the process I took out the spark plugs to make it easier to turn the engine over.

Image
By austinjrussell at 2012-06-16
Image
By austinjrussell at 2012-06-16

That's one plug, but they pretty much all look like that. Lots of cruddy build up. These plugs have probably 8000 miles on them :/

What the H is my problem? I haven't been able to find a cheap fuel pressure gauge locally, and I don't really want to order one, but maybe I have to at this point?
I can't find any vacuum leaks, but all I'm doing is listening for one. Everything sounds good. A little less than a year ago I replaced a few vacuum hoses, intake gaskets, and valve cover gasket. My intake boot looks good.
Image
M20_fever wrote:Austin is right.
Nsquared97 wrote:You were right again Austin!
87e30 wrote:Austin is right yet again!

Build Thread
User avatar
Yoshi
Site Admin
Posts: 9087
Joined: Thu Feb 26, 2009 7:47 pm
AntiSpam: No
Location: North VA
Contact:

Re: Error code 1222...uht oh.

Postby Yoshi » Sat Jun 16, 2012 9:10 pm

change plugs, should run much better.
Image
Status: HG repair. 488wtq though!
User avatar
AustinR
I <3 E30's
Posts: 1184
Joined: Wed Dec 07, 2011 2:53 am
AntiSpam: No
Location: Grand Rapids, Michigan
Contact:

Re: Error code 1222...uht oh.

Postby AustinR » Sun Jun 17, 2012 9:01 pm

The plugs aren't old.
I mean I could just keep changing them every couple thousand miles but that doesn't seem like fixing the problem.
Image
M20_fever wrote:Austin is right.
Nsquared97 wrote:You were right again Austin!
87e30 wrote:Austin is right yet again!

Build Thread
User avatar
M20_fever
Größter Vorsitzender
Posts: 11026
Joined: Fri Feb 27, 2009 1:28 pm
AntiSpam: No
Location: Northern IL

Re: Error code 1222...uht oh.

Postby M20_fever » Sun Jun 17, 2012 9:32 pm

Those plugs look like its running really lean.
Image
Midwestern Councel C Prepared class champion 2012
North Suburban Sports Car Club C Prepared class champion 2012
HSAX Instructor

GET YOUR E3P GEAR HERE: http://www.cafepress.com/e3pgearshop
User avatar
AustinR
I <3 E30's
Posts: 1184
Joined: Wed Dec 07, 2011 2:53 am
AntiSpam: No
Location: Grand Rapids, Michigan
Contact:

Re: Error code 1222...uht oh.

Postby AustinR » Sun Jun 17, 2012 9:37 pm

Piss.
That's what I thought too. FPR? I might just order one...
Image
M20_fever wrote:Austin is right.
Nsquared97 wrote:You were right again Austin!
87e30 wrote:Austin is right yet again!

Build Thread
User avatar
M20_fever
Größter Vorsitzender
Posts: 11026
Joined: Fri Feb 27, 2009 1:28 pm
AntiSpam: No
Location: Northern IL

Re: Error code 1222...uht oh.

Postby M20_fever » Mon Jun 18, 2012 12:35 am

I would check fuel pressure before and after the FPR to eliminate it from the equation.
Image
Midwestern Councel C Prepared class champion 2012
North Suburban Sports Car Club C Prepared class champion 2012
HSAX Instructor

GET YOUR E3P GEAR HERE: http://www.cafepress.com/e3pgearshop
7pilot
E30 Guy
Posts: 59
Joined: Wed Nov 16, 2011 4:30 pm
AntiSpam: No

Re: Error code 1222...uht oh.

Postby 7pilot » Mon Jun 18, 2012 1:18 pm

The plugs look oil fouled to me.
The amount of carbon on the plug in 8k miles suggests that oil is getting past the rings AND is being ingested from the sump via the bitch pipe.
All this oil is leaning out the fuel mixture, hence the light looking spots on the plugs.

Engine is worn, imo.

m

Return to “Engine”

Who is online

Users browsing this forum: No registered users and 1 guest