aaronritchie
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« on: November 13, 2014, 01:15:17 AM »
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Car was running great until i had new timing belt kit fitted. May just be coincedence , but here is the story. I have torque running and noticed car felt less responsive and heavier on fuel so did log. on previous logs timing pull was no more than 6 after 5800 rpm and maf reading was approx 205g/s at 6100 rpm. My trims were normally -0.8 and -3.9 . Now trims are are both at zero (havent reset them) . Now its pulling up to 9 degrees timing from 5.5k and the corrected load seems to be being pulled too . Now peak airflow is about 191g/s . Have done leak test and no leaks . My two ideas on cause would be a failing maf (a brand new oem one fitted about 16 months ago) or the timing is out after belt change. I have attached the log i took after belt change. Any pointers would be a great help. Thanks . Oh boost requested is 1.2 bar on map. No fault codes. I also put stock map on and trims are the same after two days or running (they would normally be 0.8 and -3.1).
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« Last Edit: November 13, 2014, 06:26:50 AM by aaronritchie »
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ddillenger
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« Reply #1 on: November 13, 2014, 02:53:26 AM »
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Have you checked measuring block 093?
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aaronritchie
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« Reply #2 on: November 13, 2014, 03:12:07 AM »
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Have you checked measuring block 093?
No i have not. Whats on block 093 ? Thanks
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ddillenger
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« Reply #3 on: November 13, 2014, 03:19:12 AM »
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Check it, post results. It's camshaft/crankshaft correlation.
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aaronritchie
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« Reply #4 on: November 13, 2014, 03:38:51 AM »
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Check it, post results. It's camshaft/crankshaft correlation.
ok i see what block 093 is for . Ok i will check it and post up results. Thanks
Could it be a lazy or old pre cat lambda ? There is a lambda test or age block i think. |
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« Last Edit: November 13, 2014, 05:41:15 AM by aaronritchie »
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fknbrkn
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mk4 1.8T AUM
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« Reply #5 on: November 13, 2014, 06:29:28 AM »
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Check it, post results. It's camshaft/crankshaft correlation.
can you explain how its may affect on timing? i have -7 KW in 93. should i bother about this? timing chain was replaced a week ago (with faulty ex hydrolifts), timing belt marks on crank and cam seems ok.. no changes. vvt unit was changed a year ago with the timing belt |
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aaronritchie
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« Reply #6 on: November 13, 2014, 06:54:49 AM »
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can you explain how its may affect on timing? i have -7 KW in 93. should i bother about this? timing chain was replaced a week ago (with faulty ex hydrolifts), timing belt marks on crank and cam seems ok.. no changes. vvt unit was changed a year ago with the timing belt
as far as i know its how far your cam and crankshaft are out in degrees between each other. The max tolerence from autodata is +/- 4 ok can rule out both lambda as they passed vcds tests along with cat |
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« Last Edit: November 13, 2014, 12:05:12 PM by aaronritchie »
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hopsis
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« Reply #7 on: November 13, 2014, 12:44:33 PM »
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Do You know if whoever did the belt job used the correct tools? Half a tooth off will produce the results You are seeing.
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10101011
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« Reply #8 on: November 13, 2014, 12:53:24 PM »
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as far as i know its how far your cam and crankshaft are out in degrees between each other. The max tolerence from autodata is +/- 4
ok can rule out both lambda as they passed vcds tests along with cat
Did I miss something ?? what engine is it ?? 1.8t,2.7t, ? The belt was incorrectly done..... . on a 2.7T You need both banks ( left & right ) corralation readings as the crank sensor adaption reading. On a 1.8T 7kw is way too much for a tuned engine ... Just have the belt redone.The belt is off by one tooth.. Lee |
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Poor quality lingers long after the price is forgotten ....
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ddillenger
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« Reply #9 on: November 13, 2014, 02:17:05 PM »
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Did I miss something ?? what engine is it ?? 1.8t,2.7t, ?
The belt was incorrectly done..... . on a 2.7T You need both banks ( left & right ) corralation readings as the crank sensor adaption reading. On a 1.8T 7kw is way too much for a tuned engine ... Just have the belt redone.The belt is off by one tooth..
Lee
One tooth is usually closer to 20 in my experience. |
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
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10101011
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« Reply #10 on: November 13, 2014, 03:34:28 PM »
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One tooth is usually closer to 20 in my experience.
There are 52 teeth on the cam gear..... follow me on this one  360 deg/52 teeth=6.92 degrees between teeth. The computer reads that as 7 deg. Being a mechanic for 20+ years ... I know this stuff like the back of my hand. I have seen this countless times in my shop.  I hope this helps you. Lee |
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Poor quality lingers long after the price is forgotten ....
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ddillenger
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« Reply #11 on: November 13, 2014, 03:59:16 PM »
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There are 52 teeth on the cam gear..... follow me on this one 360 deg/52 teeth=6.92 degrees between teeth. The computer reads that as 7 deg. Being a mechanic for 20+ years ... I know this stuff like the back of my hand. I have seen this countless times in my shop. I hope this helps you. Lee Your math is good  There was some discussion about that reading not being degrees however. |
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
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vwaudiguy
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« Reply #12 on: November 13, 2014, 04:42:42 PM »
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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fknbrkn
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mk4 1.8T AUM
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« Reply #13 on: November 13, 2014, 06:55:14 PM »
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i did this job. engine is 1.8t
crank mark and cam mark are matched. after releasing tensioner i made some crank turns and recheck marks, they was ok.
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aaronritchie
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« Reply #14 on: November 14, 2014, 12:57:38 AM »
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I have carried out all lambda test/cat test and all pass ok . Took another log to check injector time and max is 18ms so its not a weak pump or filter . My bet is MAF as the log recorded max of 180gs . Boost matched requested at 1.2 bar .
MINE IS A 1.8T BAM . So the reading mine gets is acceptable at -2 ?
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« Last Edit: November 14, 2014, 01:01:28 AM by aaronritchie »
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