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Marty
Marty , European Car Expert
Category: UK Car
Satisfied Customers: 394
Experience:  ASE & Bosch Certified Master Tech. Over 30 years experience.
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Audi A3: CAR STUTTERING MISSING WHEN UNDER LOAD NEW INJECTORS

Customer Question

CAR STUTTERING MISSING WHEN UNDER LOAD NEW INJECTORS FITTED IS THERE A CLEARANCE YOU MUST HAVE ON THE TAPPET SIDE
Submitted: 3 years ago.
Category: UK Car
Expert:  Rob replied 3 years ago.

Hi and welcome to just answer.

there is know adjustment on the tappets they are hydraulic.

have you had any diagnostics done on the vehicle ?

any fault codes?

have you checked all turbo pipes vacuum and intercooler?

regards rob

Customer: replied 3 years ago.
Done all that. No fault codes came up.
Expert:  Rob replied 3 years ago.

do you have access to diagnostics?

regards rob

Customer: replied 3 years ago.
Car was misfiled with petrol only stutters under load when car heats up you can adjust the injectors by an Allan key on the rocker shaft
Expert:  Rob replied 3 years ago.
do you get an injector knock at idle?
Customer: replied 3 years ago.
No
Expert:  Rob replied 3 years ago.

do you have access to diagnostics?

for a live data reading.

have you checked and cleaned EGR valve?

Customer: replied 3 years ago.
Its a new egr valve no handy to diagnostics but there is no fault codes
Expert:  Rob replied 3 years ago.

Hi

most diagnostics have a feature called live data and reading the voltage and signals from sensors can often find where the fault is even without a fault code.

regards rob

Customer: replied 3 years ago.
All live data looks good after the injectors were fitted the readings were all over the place on injector side
Expert:  Rob replied 3 years ago.

Hi can you get a reading for the ECT sensor (engine coolant temp sensor) at running temp?

regards rob

Customer: replied 3 years ago.
It's a new sensor fitted
Expert:  Rob replied 3 years ago.

HI

i have ask many questions and have been told all the way that this has been replaced or done and feel that given this information if given would have saved time i am opting out and will repost this question for another tech with patience will help you .

regards rob

Expert:  Josie-Mod replied 3 years ago.
Hi, I’m a Moderator for this topic. It seems the professional has left this conversation. This happens occasionally, and it's usually because the professional thinks that someone else might be a better match for your question. I've been working hard to find a new professional to assist you right away, but sometimes finding the right professional can take a little longer than expected.

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Customer: replied 3 years ago.
Yes I can wait but need information ASAP.
Expert:  Josie-Mod replied 3 years ago.
Thank you for your continued patience. We will continue the search for a professional for you.
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Thank you for your patience, your business is very important to us, we are waiting on the Professional with the right expertise to come online. Feel free to let us know if you would like us to continue searching for a Professional or if you would like us to close your question. Thank you for your understanding!
Customer: replied 3 years ago.
Yes I still need the information.
Expert:  Josie-Mod replied 3 years ago.
Thank you for your reply. Your question is marked high priority and is open to all professionals. We will be in touch with you shortly.
Expert:  Juan Crespo replied 3 years ago.

Hi there, Here is the procedure to adjust the injectors: The correct method is to use a dial indicator mounted onto the rocker, then rotate the engine until the full depth of the stroke is reached. Screw in the adjuster screw until it bottoms out. Then back it out 180 degrees. Tighten the ball screw lock nut to 24 ft lbs. VW did standardize the setting for all PD motors for a 180 degree setting. The problem is, there is no decent place to attach a dial indicator's bolt-on or magnetic mount. The following pictures show how to do the operation with no dial indicator. This is the position of the cam with the #4 injector rocker fully depressed, side and top view:

 

 

 

Please let me know if this what you were looking for. Cheers.