No Idea where to start

dimonx · 12-31-2003, 03:23 PM

I bought an 97 A4 1.8T Quattro about 4 months back. I also have the VAG-Com tool (excellent BTW - Good job Uwe). But I really don know where to start.

I have no fault codes (good I guess). But the car seems to be very sluggish. Delayed accelaration (intermittent).

If there a guide out there that I can follow to check and see if my engine is up to scratch. I thought it might be the MAF - since i get a reading of around 30 - but thats giving gas to the car(not actually moveing - I have the brakes on) Does this matter?

Someone please help - I dont know where to start. I love my car - and the VAG-COM tool is great - but I dont know where to start, what to look for and how to compare. I need to know if this car is running as it should. I cant even find the specs on this car.

Anyone - Someone - please....

DFWTip01 · 12-31-2003, 05:52 PM

Are the BPV's clean?

Post your question in th A4 forum, you should get a response there.

Uwe@Ross-Tech.com · 01-01-2004, 05:16 AM

you'll find it one one of the first few measuring block groups, it will be in g/s (grams/second). Get your motor warmed up, then log it for a full throttle run through the highest gear you dare (3rd?). At 5000-6000 rpm, under full load, you should see about 120 g/s -- 80% of the rated HP of your car -- if you're chipped and you think your car should be making 190hp, then you should see more like 150 g/s. If you see signifigantly less than 80% of your hp, then either the MAF bad or there's something keeping your motor from getting an appropriate amount of air. Next you'd have to check your boost, but since your cable-throttle engine doesn't have a manifold pressure sensor, you'll need to install an actual boost gauge to do that.

-Uwe-

dimonx · 01-01-2004, 10:00 AM

Thanks for the info... I dont even know how much HP i should have. anyway to find out? any tech docs out there?

Uwe@Ross-Tech.com · 01-01-2004, 11:00 AM

dimonx · 01-02-2004, 09:07 AM

once again - Thanks for the follow-up..

12-31-2003, 05:52 PM	#2
DFWTip01 New Member Garage is empty, add now Join Date: Dec 2003 Posts: 22	Re: No Idea where to start Are the BPV's clean? Post your question in th A4 forum, you should get a response there. __________________ 2001.5 Tip, 45k miles, ITG, Forge BPV's, AMS ECU, Borla catback, Intrax MC, snub

01-01-2004, 05:16 AM	#3
Uwe@Ross-Tech.com Audiworld Premium Sponsor 2006 Audi A3 Join Date: Sep 2000 Posts: 2,230	Start out by logging your Mass Airflow you'll find it one one of the first few measuring block groups, it will be in g/s (grams/second). Get your motor warmed up, then log it for a full throttle run through the highest gear you dare (3rd?). At 5000-6000 rpm, under full load, you should see about 120 g/s -- 80% of the rated HP of your car -- if you're chipped and you think your car should be making 190hp, then you should see more like 150 g/s. If you see signifigantly less than 80% of your hp, then either the MAF bad or there's something keeping your motor from getting an appropriate amount of air. Next you'd have to check your boost, but since your cable-throttle engine doesn't have a manifold pressure sensor, you'll need to install an actual boost gauge to do that. -Uwe- __________________ http://www.Ross-Tech.com

01-01-2004, 10:00 AM	#4
dimonx New Member Garage is empty, add now Join Date: Dec 2003 Posts: 32	Re: Start out by logging your Mass Airflow Thanks for the info... I dont even know how much HP i should have. anyway to find out? any tech docs out there? __________________ -DIMoN \| X (dXs) ::::::::::::::::::::::::::::::: ::97' A4 1.8T Quattro (Stock):: :::::::::::::::::::::::::::::::

01-01-2004, 11:00 AM	#5
Uwe@Ross-Tech.com Audiworld Premium Sponsor 2006 Audi A3 Join Date: Sep 2000 Posts: 2,230	A stock 1997 1.8T is 150 HP. __________________ http://www.Ross-Tech.com

01-02-2004, 09:07 AM	#6
dimonx New Member Garage is empty, add now Join Date: Dec 2003 Posts: 32	Re: A stock 1997 1.8T is 150 HP. once again - Thanks for the follow-up.. __________________ -DIMoN \| X (dXs) ::::::::::::::::::::::::::::::: ::97' A4 1.8T Quattro (Stock):: :::::::::::::::::::::::::::::::

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