20 Most Recent 1993 Audi 100 - Page 7 Questions & Answers

did the computer get wet? did the Ignition control module get wet? if they did they must be replaced, as all connector must be pulled apart and checked for any corrosion, this will be allot of work and may not be worth the expense and labor time..

Buy a panel puller at Autozone and pry it loose AT THE BOTTOM NEAR THE HINGE first. If you accidentally break the clip, it won't be noticable. Do it on top first, and you're door panel is in your lap everytime you drive. Most panels have clips that just snap in. In theory, they just snap out, but they often break in the process. Be prepared to go to the parts store to buy replacement. Cheap, but can be a pain in the ****. Good luck.

Go to ebay motors and enter you year, make and model order the repair manual on cd they are about $20.00 and have service bulletins, recall info, and of course a detailed repair manual inside.

add a can of SEAFOAM to a tank or at least 1/2 tank of Premium gas. later change the fuel filter, and see how that does. ethanol gas problem #99. add a can of SEAFOAM every 3000 miles and it will cure your emission.fuel and engine ping, and carbon problems.

The egr valve may be faulty or leaking air. Otherwise you may have a plugged or cracked vacuum line or low vacuum pressure

Serpentine belt is the external belt that drive the water pump,alternator,A/C compressor and power steering pump.

Timing belt is not the same as serpentine belt.

Timing belt drive the cylinder head and ride on the tensioner.


Changing serpentine belt will ne change the timing belt.

To change serpentine belt you will need to locate the belt routing diagram or draw one (SEE HOW THE BELT warp around the pully)

A long wrench to release the pulley tensioner.

Remove and install the new serpentine belt.

It will easier if you can have someone pull on the wrench and you can slide on the serpentine belt.

Hello,

You're probably facing 'fuel pressure problem'. Your fuel pressure regulator doesn't hold pressure. FYI, it is located at the fuel distrbutor, has a cylindrical shape. There's a return valve that send back excess fuel to the fuel tank. A faulty FPR will cause this problem.

If it's an automatic, try putting it in Neuteral and then starting it. If that works, you have a contact in your shifter (park) that's going/ gone bad. Hope this helps

Do check it out.

Cheers!
Ryan

Fuel pumps always under the bonnet near or on the engine.
Tank only has some float level device signalling to front dashboard.

Undo the rear seat and you get the picture.
For full details see if you can get a famous Haynes manual on that model Audi. You'll love it.

Do you checked the petrol filter? It can be simple as that.
check the MAF, the spark plugs and cabling, air filter, petrol pump.
I had the same problem with mine (same year, same model), I cleaned all the air intake system, fuel line, and now it's perfect (even needing to change petrol filter, i didn't changed it yet). Careful cleaning the MAF, if you don't know how to do it don't do it, ask an expert near you.
If you can't solve the problem this way, search for air or fuel leaks.

I solved mine cleaning the fuel line and the air intake system.

Question edited for clarity. https://www.google.com/search?q=1993+Audi+500+SEL+2.8+speed+sensor+location ..

Check the codes!

I would check the OBD codes for clues.

Try the row of large switches above the radio. It is most likely the middle one.

Let's break down the situation: EPC Light: The EPC light typically comes on when there's a problem with engine sensors or components. It might be related to the throttle sensor or the temperature sensor. When the EPC light activates, the engine electronics may limit power and maximum RPM. As a result, the computer might restrict the engine's performance, allowing you to drive at low speeds only. Check Engine Light: The Check Engine light illuminates when the engine management system detects a fault or error. The codes you've provided indicate specific issues: Code 17950/P1542/005442: Angle sensor 1 for Throttle Actuator (G187) has an implausible signal. Code 16891/P0507/001287: Idle Control System RPM is higher than expected. Possible Causes and Solutions: Fuel System Issues: Given the fault codes related to fuel pressure, it's essential to check the fuel system. Low fuel pressure could cause hesitation and trigger both lights. Mass Airflow Sensor (MAF): A faulty MAF sensor can lead to engine hesitation, rough idling, and stalling. Consider inspecting or replacing the MAF sensor. Throttle Body: Although the dealer replaced the throttle body earlier, it's worth verifying its functionality again. Idle Control System: The high RPM issue might be related to the idle control system. Inspect the idle control valve and related components. Wiring and Connections: Check for loose or damaged wiring, connectors, and vacuum lines. Next Steps: Diagnostic Scan: Perform a thorough diagnostic scan to identify any additional fault codes. Visual Inspection: Inspect the throttle body, angle sensor, and wiring connections. Fuel Pressure Test: Verify fuel pressure using a fuel pressure gauge. MAF Sensor: Consider cleaning or replacing the MAF sensor. Idle Control Valve: Inspect the idle control valve for proper operation. Remember that intermittent issues can be challenging to diagnose. If the problem persists, consult a qualified mechanic or an Audi specialist to pinpoint the exact cause and address it effectively.

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Read the ODB2 codes for an accurate assesment.

The fuel pump fuse is located in the engine bay fuse box. It is the 2nd row from the top, last fuse on the left.

The OBD2 port is connected directly to the ECM and data from other modules is shared from there. 'Mechanics' deal with the mechanical aspects of the car, you need a specialist auto electrician. They have the knowledge and experience and the ability to access and read wiring diagrams. https://www.google.com/search?q=auto+electrician+near+me The first thing to check would be the connectors on the ECM and BCM. Then open them up and look for burned out components. Full wiring diagrams normally require a website paid or unpaid subscription. https://www.google.com/search?q=1999+Audi+A6+Avant%2C+1.9TDI+wiring+diagram Re-reading the question, did you have one model and year of vehicle and then replace the engine from a different year and model? You can't do that, the ECM has no idea what's going on. ECM are dedicated to the engine it is connected to and programmed accordingly ..

car sold to what country ? what is VIN,m what exact engine options is there books are by full car name spec, engine, VIN, and country sorry we can't guess all that. ask Audi this new care mostly do not have the service manual sold yet. but ask them nobody else has it for sure not published yet. same answer for 100 years.

where does it leak from, investigate, you may need to tank, could be hoses. Unable to investigate take to repair shop.