leave-eye

Ok heres the deal, I pulled my motor did cam valve springs new torque converter resealed everything. Im trying to figure out what is going on, its running crazy rich, fuel pressure was low so i replaced fuel pump with a walbro 255 and filter. Runs a little better now but data log shows that the fuel trims are all wacked. I put new o2s in with no improvement, it idles good, lacks power when driven. my oil smells like gas and seems a little diluted. Do i have a leaking injector? bad fpr? i dont know what is going on. someone please help with this i dont wanna ruin my motor this way. i dont know if its the cam thats throwing everything all out of whack. i have a datalog if someone wants to look at it and see what they can tell me from it.

Injuneer

What are the values for the long term fuel trims, in which cells? "Wacked" doesn't really provide much usefull information.....

leave-eye

ijuneer, you seem to know your stuff really well, i have a datalog file would you mind taking a look at it to see? if youd rather not i can just let you know what the values are on as many cells as i can. thanks

Injuneer

I'd prefer you to post the available data. I have too many files now that I haven't had a chance to look at yet.

leave-eye

cell 16 in closed loop
Lterm 108 160
Sterm 121 138

cell 17 in closed loop
Lterm 128 159
Sterm 124 140

cell 15 closed loop
Lterm 128 129
Sterm 128 141

cell 3 closed loop
Lterm 108 160
Sterm 105 138

cell 11 closed loop
Lterm 118 160
Sterm 114 128

cell 6 closed loop
Lterm 122 153
Sterm 114 137

cell 18 closed loop
Lterm 119 160
Sterm 94 138

cell 7 closed loop
Lterm 108 154
Sterm 130 122

cell 2 closed loop
Lterm 115 160
Sterm 106 140

cell 10 closed loop
Lterm 128 152
Sterm 113 137


Ok I hope that may give you an idea of what im looking at

GreasyB

I had a similar problem. What are your iac counts at?

mad95z

Have had similar issues before.

Have you checked all the usual suspects? Misfires, exhaust leaks, have you had the pcm tuned?

Injuneer

What did you use for O2 harness extensions with the long tubes? Are the O2 values moving over the full range of 0xx-9xx mV in closed loop?

Can you upload the file to an ftp site? Split BLM's at idle is one thing.... but you seem to have a problem that affects the BLM's under a wide range of operating conditions.

leave-eye

looks like the o2 on the right bank is reading funny, between 300-700 and the two banks are not consistent with each other. left bank goes from 100-900. what does this mean? and for the extension i just spliced the wires. may be possible that im getting some bad readings?

Expense95

Splicing the wires for the O2 extensions yields erroneous readings. This is caused by the type of wire you use, resistance, splicing material, etc...

leave-eye

Also forgot to mention, I have no pcm tune as of yet. Talked to a race bike builder today at work, he said by the symptoms that it sounds as if im getting vacuum leak somewhere. My only theory for that is when Id did the egr block off plates i may not have got them sealed well enough. But if I did have a vacuum leak wouldnt my manifold pressure be bad?



And here is a link to download the datelog file

http://www.gigasize.com/get.php?d=01lbz583wxd

leave-eye

To answer your question GreasyB, the iac is really high at idle looks like between 100-80

Injuneer

Couldn't get that site to download... seemed like all it did was keep recycling, telling me to wait 60-seconds, and posting phony "you are the 10,00th visitor" scams. Then it indicated it was downloading a picture. For anyone else, avoid that site.

If you want to send the file in a e-mail, make sure you put your screen name and the fact its a datamaster file in the topic, or I won't open it.

rickreeves1

After I finished my cam swap I was having some problems with it running rough and poor performance. Datamaster showed split blm's. It turned out to be a loose spark plug that worked it's way out. It sounds like you may have some other issues though.

My datalog at the time..
http://www.mediafire.com/file/zidwim...ll_3_23_09.uni

www.mediafire.com is good for posting files

leave-eye

Im fairly certain that the plugs and wires are all good, ive gone through them several times. Could my problem be from valves being out of adjustment maybe? I readjusted them but I am not certain on my technique I haven't done it before owning this car. But what are the odds that the one side would be that far out and the other side be good, don't really know. I sent you the data log Injuneer so maybe seeing the whole operating range you could give me a better idea, I haven't ever tinkered with a fuel injected car so it's pretty new to me