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Hi all - checked a few more things today:
Pulled all 4 plugs and they look fine to me (see pics)
Did a vacuum test from the PCV hose and warmed up at idle it sits at 17 hg - I think that's ok. (see pics)
Shot a short video of my Boost gauge (attached). Normal operation as far as I know.
Which led me to believe that maybe I do have the incorrect belt on the car. The original owner installed the an Alta ver 2.0 pulley on the car. I was told it was a 15% but I have no way of really confirming this. It measures 6cm across (see pics) Can someone confirm what size pulley I actually have?
...or any other thoughts with this new info?
Thanks!
I'm still saying belt slip, lol I thought these cars were just not peppy enough . I had mods ect and was only boosting like 11psi which I thought was normal. Decided to throw on a new belt and BAM she was sooooo much stronger and then it was peaking at 16psi max..wow that 5psi makes a huge difference in the higher rpms and speeds .
The o-rings job is to seal the injector body to the manifold, if the injector to manifold seal is good then no leak, if it cant make that seal it will leak under pressure. I personally have only had 1 truly bad fuel injector over the years and I seem to recall having an o-ring leak on an injector. Cant pick out the car it was but I'm pretty sure it was one of the Hondas (mid 80's MY)
The function of the rubber o-rings for these Non-direct injection injectors are in providing an air tight seal while providing some dampening properties for sound and vibration. They're on the back side of the valves....Albeit rare in the W11 engine, typically after run though 1,000's of heat cycles over time they can become hard and brittle allowing unmetered air to enter the back side of the intake valves. When I swapped my stock 340's for JCW 380's this was evident in a 6 yr old R53 while having no drivabiltiy issues, at least not at that time....Had I continued, it would have become rough running as was the case of many EFI VW Engines I worked on in the mid 70's and up. None of them leaked fuel either.....Maybe it's a "German" thing....?
Originally Posted by Steven Melchiorre
Hi all - checked a few more things today:
Pulled all 4 plugs and they look fine to me (see pics)
Did a vacuum test from the PCV hose and warmed up at idle it sits at 17 hg - I think that's ok. (see pics)
Shot a short video of my Boost gauge (attached). Normal operation as far as I know.
Which led me to believe that maybe I do have the incorrect belt on the car. The original owner installed the an Alta ver 2.0 pulley on the car. I was told it was a 15% but I have no way of really confirming this. It measures 6cm across (see pics) Can someone confirm what size pulley I actually have?
...or any other thoughts with this new info?
Thanks!
That 2.0 pulley came in: AMP-ENG-200V2 - 15% AMP-ENG-205V2 - 17% AMP-ENG-210V2 - 19%
@MiniManAdam thanks for the info. I'm acquiring a belt tensioner tool and hope to change it this weekend.
One question - Watching ModMini's videos he recommended a 060532 belt for a 17% pulley while the chart above reccomends a 060539 belt.
Any thoughts/ comments on this?
It's been mentioned, but have you tried the 30-second drive-by-wire throttle re-sync?
Ignition on, engine not running, gas pedal all the way to the floor & hold for 30 seconds, ignition off, key out, release gas pedal.
@MiniManAdam thanks for the info. I'm acquiring a belt tensioner tool and hope to change it this weekend.
One question - Watching ModMini's videos he recommended a 060532 belt for a 17% pulley while the chart above reccomends a 060539 belt.
Any thoughts/ comments on this?
I just did a 17% pulley on a stock sized ATI dampnr and used a 060535. There was no way a 060532 was going to go on. I even tried to compress the tensioner to its max and no way that size belt was going on. Maybe there is a slight difference between the actual pulley diameter on the ATI vs OEM??
Ran into this not two months ago after using a NAPA 25-060532 belt size for last 7-8 yrs while having done nothing to change the loop range configuration.....my best guess is a change in the belt manufacturing location. Could be one manufacturer now for the various brands and not making to proper length.
Ran into this not two months ago after using a NAPA 25-060532 belt size for last 7-8 yrs while having done nothing to change the loop range configuration.....my best guess is a change in the belt manufacturing location. Could be one manufacturer now for the various brands and not making to proper length.
loop range ???? Do you mean by moving the idler pulley into the other spot rite near it ???? I noticed it while putting my car back together. Lol I put it on it that spot and was like uggghhh somethings wrong .lol
loop range ???? Do you mean by moving the idler pulley into the other spot rite near it ???? I noticed it while putting my car back together. Lol I put it on it that spot and was like uggghhh somethings wrong .lol
Didn’t swap sc or scp or go to larger crank pulley. Configuration stayed the same and yet replacement 532 did not fit....
@MVPeters - thanks for the reminder. Will try that ASAP.
Re: belts I think I'll pick up a 25-060532 and a 25-060535 and see which one fits
Will report back...
ah...and one other question - I'm assuming that the part number is written on the belt. Any advice on how to spy that number on the belt on my car w/o taking it all apart?
I'd like to know what size belt I'm actually running.
Just for reference, my notes on belt sizes are as follows:
Stock is 1390mm (K06047)
JCW Stock (11% IIRC) is 1371 mm (K06039)
and for a 15% pulley is 1369mm (K060535)
I run a Cravenspeed 15% underdrive and a 2% overdrive with a 060535 belt.
Just for reference, my notes on belt sizes are as follows:
Stock is 1390mm (K06047)
JCW Stock (11% IIRC) is 1371 mm (K06039)
and for a 15% pulley is 1369mm (K060535)
I run a 15% underdrive and a 2% overdrive with a 060535 belt.
I’ve been looking for info on this combo, but sizes can vary between brands. What brand(s) 060535 have you run?
Looking at your list again, you have the same belt for a 15% + 2% combo as for the 15% alone. Is it hard to install the 060535 due to the bigger crank pulley?
No fitment problem at all, do check your idler pulley while you're at it, its a 2 bolt replacement and it'll save you from having to do this again. Don't ask why I'm mentioning this
Quick update.
Tried the throttle reset procedure outlined above and had no effect on my issue. :(
Went to my local Lordco and they only had the 25-060535 belt in stock. Purchased that belt and using my newly acquired belt tensioner tool removed the old belt and confirmed that it is also a 25-060535 :(
I have a 25-060532 on back order and will try this again next weekend....
Update - I changed the belt to a 25-060532 and it did seem to make a bit of difference but the issue is still there.
Using my Ultragauge I'm going to record fuel pressure and Manifold pressure readings to help gather some more data.
Anyone else have any ideas?
Ever smoke test for vacuum leaks ? See how i rigged mine up ? Cost 20$ and very effective , I found my vacuum leak it 1min . But I also knew I had one as I only was at negative 7lb or or in neutral idle when it should be around 13 or 14lb..
but you just pump the smoke through the hard line under the intercooler that plugs into the front of the sc, light the cigar and put it in line and just pump the pump and if you see smoke come out , there's an issues there... o yea, block off you throttlebody with like a glove or something as smoke will come out of the intake filter and might fool you
I did install a boost gauge and made sure that all fittings are secure and zipped tied shut to prevent a vacuum leak under the intercooler horn....and my gauge reads steady with no fluctuations.
.
What were your boost readings AND when off the throttle at idle, what is the reading on the boost gauge as the needle dips down to the left....
Ever smoke test for vacuum leaks ? See how i rigged mine up ? Cost 20$ and very effective , I found my vacuum leak it 1min . But I also knew I had one as I only was at negative 7lb or or in neutral idle when it should be around 13 or 14lb..
but you just pump the smoke through the hard line under the intercooler that plugs into the front of the sc, light the cigar and put it in line and just pump the pump and if you see smoke come out , there's an issues there... o yea, block off you throttlebody with like a glove or something as smoke will come out of the intake filter and might fool you
