[golfette91]

I have a b5 passat atw with motaza tune 550cc injectors, big maf, big turbo inlet, with f21 turbo. Had garage install it got car back and cuts out at highrpms and since i didnt do the work i dont have any idea where to begin. Im run stock fuel pump newer 2.0t coils new plugs and manual boost controller . Runs fine if not boosted but when you get into it cuts out like crazy. Wastegate set at 8psi and im not running n75. Before with the ko4 on it was running fine but after the swap the the car runs terrible . I just need some advice to where to begin . Thanks

 

[PassatCRO]

It could be stock fuel pump... it cant support on higher rpm.
Do you have any codes? Firtsly i would start with scanning to see if there are any codes.
Second I would do some logs.

 

[PZ]

If you don't have VCDS, get it. Do you have a boost gauge? Is the boost staying under 8psi? Motoza is usually good tuning, I didn't know they still did older B5s.

 

[golfette91]

I scanned it today and got a open circuit on injector 3 and low voltage b+ code and other codes are for abs and tcu not connected which i got get vcds to soft code the ecu to manual any yall got a vcds link so i can downloaded it on my labtop then. And as far as fuel pump i was told the stock could handle it from motoza and frankenturbo. I do have a gauge and hits 15 and tapers to 10 but its hit or miss sometimes . Once it get lil warmer i will run logs to see what going on and test my injectors .

 

[PZ]

Did you try a smaller plug gap or stronger coils? Check the wiring on the #3 injector. Pull back the rubber cover and look for cracks, do the same for the coils. Would the install shop cover the diagnostics? They should give you a running product if they installed the tune.
You will need to buy a cable from them to run the full software:

Ross-Tech: VCDS

www.ross-tech.com

 

[golfette91]

Did you try a smaller plug gap or stronger coils? Check the wiring on the #3 injector. Pull back the rubber cover and look for cracks, do the same for the coils. Would the install shop cover the diagnostics? They should give you a running product if they installed the tune.
You will need to buy a cable from them to run the full software:

Ross-Tech: VCDS

www.ross-tech.com

Yes i have the motoza wire and labtop with program . As far as the garage install was a joke they couldnt get the 034 motorsports manifold installed thats needed for the frankenturbo cause has bigger runners then the stock cast log cause they couldnt get a wrench on to tighten the nuts smh my battery was left dead with my lights on and covered in mud. They also drove the car without the right tune in it at high rpms with no regard of my process smfh. I had spark plugs before the the install but they pulled then and said they were faulty so idk what's in it now . I had em gap at .28 coils are new 2.0t reds upgraded coils and i have all coils wires redone . I haven't check the injector yet plus i noticed with the cutout it over boosting only in 3rd through 5th it wants spike 20 psi when wastegate set at 8psi with manual controller so its causing a cut but if i let off mid throttle it will stay at 10psi in 3rd through 5th which i have no idea what's that's about . I plan on getting into over weekend cause temps will be reasonable . And thanks for link man . This car means everything to me and i glad for the help trying to figure it out .

 

[PZ]

Can you read the fuel trims? Do you still have a stock cat? I'd start with checking the plugs and fuel trims, then the cat and wastegate 3rd.

 

[golfette91]

Can you read the fuel trims? Do you still have a stock cat? I'd start with checking the plugs and fuel trims, then the cat and wastegate 3rd.

I got the injector fixed. And runs a bit better im going be doing logs tom after changing the dv spring out . I have a dp no cat and ill look at the trim with the logs and send them to motoza . Then ill check plugs. They also said the wastegate should be fine so ill check that off the list . I also did a parallel hook up with the mbc to n75 and fixed the garages hook up. So ill get back to you with an update .