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Audi RS2 -94 Swe

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  • Hello! Today i torqued the last rear bolts of the suspension when the car was on the ground as the manual said. Changed the FPR and temp sensor for ECU. After the change the car started with a huge missfire... Thought it was some air in the fuel system, but it didnt get better. So i shut it off, then it didn't start at all! Changed back to the old stuff. No start.. Off with the fuel supply line, the pump was running. Measured fuel pressure (about 4bar), tested injector supply "diod test", all good. Checked the spark on cyl nr1, no spark at all. Changed to better used original spark plug, now i had spark... Changed to better used spark plugs F5DP0R and then it fired right up. I was also thinking of doing a leak test of the intake system today, but this fault finding took the time today. I both love and hate this old lady from time to time Well now it runs silky smooth on idle, thats something good after all, lets see how it likes some boost if the weather allows some day soon.

    Old vs new FPR, some difference.
    45764-f7c10c8387219a21f5ff83ea1704bdde.jpg 45764-4cdc0a80bb2ec24fd277d5fd9c2ddce6.jpg
    Last edited by s0_big; 21 March 2021, 12:50.

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    • Weather was nice today, and i got some time. First proper test drive for 2021. Suspension feels really good, and steering is more reactive. No suprise as my old dampers was all bad. Once compressed they stayed in.. So thats a big difference. Engine is running much better since i changed FPR and temp sensor. Also the spark plugs. At the end of the summer i had some hesitations when i got up to 4 gear, full throttle/boost and the car smoked black at those occasions. That problem is now gone + the idle is spot on, better than any time before.
      Filled the tank up with some fresh 98oct and back to the garage waiting fo friday and the wheel alignment. Then it's time to do a proper polish of the car and change to my new wheels.
      45764-3f3e54f546e3efc0261fc42ec8c703aa.jpg

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      • Great result on the fuelling issue. Wouldn’t it be better to do the wheel alignment with the new wheels fitted, or does it not make any difference?

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        • Originally posted by le mans View Post
          Great result on the fuelling issue. Wouldn’t it be better to do the wheel alignment with the new wheels fitted, or does it not make any difference?
          Yeah that was good, maybe a combinaton of bad things. But as my injectors were clogged when I tried to start the car for the first time after assemble of the engine. I thought it was good to replace it also. As far as I know, that wont matter. Im afraid they damage the new wheels, also with original rims there is more space to work specially up front where its tight.

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          • Nice job! Glad the now spark problem was a simple fix and I bet it feels good to get an old nagging issue resolved. Car looks great!
            2001 A4 Avant QMS - FXK04'd
            1991 Audi CQ - Project
            1996 A4 12v Quattro Manual - SOLD

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            • Been busy in the garage. The car had a bad surface on the paint due to all mechanic and blankets on/off during the garage time. Also a lot of "wash scratches". I invested in a oscillating polish machine and some different polish etc.. Polished the car with a 3 step polish program. The result was great in my opinion. Sure, if the surface was to be perfectly flat it needs to be "water sanded?" first for top result. I dont dare or have the knowhow to do that. But i'm happy.
              Spent about 16 hours masking/polishing/waxing and cleaning. Well hopefully i can enjoy the result for some time now if i'm careful with the paint. Now it almost feels like the car has changed colour, now when the metallic is more present.

              Todays mission was wheel allignement, all good and in to spec, besides the right rear, there we had problems getting the camber into spec. Spec was about -0.50, we only managed to do - 1.00. All other measures was good. Well, i guess with old bushings and stuff it was good, but sure a little nagging to not be 100%. I will do a refurbish of the underside of th car at some point. And then i will hopefully get all in to spec.
              Now the car runs better than any time before, more shiny than ever, just need to put the new wheels on and enjoy the summer! I have a lots of small "problems" to fix, and i will post them while i sort them out. Here is some pictures of the freshly polished/alligned RS2. I hope you don't get bored with all my pictures!

              45764-3c17a242f99e2492cede8342ed57a6ef.jpg 45764-7ce7669ddc33b2f3213a04400134bd95.jpg

              45764-c66453a8336cbeec9954e9653a92b879.jpg 45764-89cc96efc5e04169340082bbad74bdca.jpg 45764-9d671ef9b7e76ae739eaab7fd7d9b071.jpg 45764-f33f877c98e7fe2071b35755be71336e.jpg 45764-72416e1065fde4753b10077009916097.jpg 45764-61fbef100189531175bb0dbbc3d650d1.jpg 45764-d42e41f16f426a743eb2d5336ee9b532.jpg 45764-ccbf1d7691fa52491297ddb8ff2c2d72.jpg
              Last edited by s0_big; 27 March 2021, 11:26.

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              • Stunning

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                • With reference to post #346 showing your new fuel pressure regulator:
                  Your new FPR has a very much smaller outlet diameter than the OE Audi unit. After having fuel over-pressure issues on a recent build of mine (an LS3 engined Cobra replica) I would ask you to test your fuel pressure at your fuel rail. Unless your fuel pump has an in-built relief valve I'm concerned your fuel pressure could be too high, as the new FPR can't physically flow enough fuel back to the tank. Safer to check now...

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                  • Originally posted by 5cylinderman View Post
                    With reference to post #346 showing your new fuel pressure regulator:
                    Your new FPR has a very much smaller outlet diameter than the OE Audi unit. After having fuel over-pressure issues on a recent build of mine (an LS3 engined Cobra replica) I would ask you to test your fuel pressure at your fuel rail. Unless your fuel pump has an in-built relief valve I'm concerned your fuel pressure could be too high, as the new FPR can't physically flow enough fuel back to the tank. Safer to check now...
                    I recognized that to. But the FPR is bought from Audi tradition, correct part nr for RS2. So I assume its right, maybe some improvement change in design? Car runs spot on now. But sure, maybe i will double check the pressure.
                    Edit:
                    The part nr on the new/old FPR is not the same. Maybe i had the wrong one installed? Partnr on the old: 0 280 160 542
                    Partnr on the new (034133534P) bought at audi trs: 0 280 160 616.
                    Last edited by s0_big; 27 March 2021, 13:00.

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                    • Such a beautiful example!
                      Thank you for the motivation.
                      //-\\ ((_)) //)) //

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                      • Originally posted by ThatGUY View Post
                        Such a beautiful example!
                        Thank you for the motivation.
                        Thank you!

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                        • After i bought new lights all around beside the front head lights i just had to replace the front head lights aswell when they are still available from Audi/Hella (Don't buy new lights around, not good for you wallet). The headlights on the car is not bad, but they have seen better days. The cover caps is drilled as some one used to have xenon lights on it at some point, and the reflectors is pretty bad when you look close. The glass is also pretty sand blasted, as the car has 240000 km on it. But i will keep the old ones as spare if something will happen. Tomorrow i hopefully will have time to get to the garage to change rims and check the bolts after the wheel alignment. Maybe also change headlights and the N75-Valve. If the weather is good i will take the car for a little cruise. The N75-valve/boost solenoid valve is just changed in prevention purpose. It's easy to get acces to when changing the headlights. Maybe i will feel some difference, maybe not. But i'm sure i will never have to worry about it (hopefully)..

                          Mr,Mrs cat inspection of the parcel:
                          45764-bfb28f2cc217650b5ff989f1966879aa.jpg Mrs cat inspector: 45764-39fa99d1796d24606f17fa450a8ff414.jpg 45764-851922c0d1e8bcde3d93ba614777901f.jpg 45764-6d3690d500dd2ca64cda284f847b2786.jpg 45764-ddaa72875d885987ff36d307686ed313.jpg 45764-1ffe32f85ffe76b96419cb446fc05efd.jpg 45764-0308314d040622aa5c6b4634e813937c.jpg 45764-5b3efadba14ba1c485f1433e61fa6b3a.jpg
                          45764-4eece056562893292a2c7b0696d9ebd2.jpg 45764-dd135784d7d6a37000c8f1a5fdf2e9f5.jpg 45764-17fd7f519ebaaad59339740ba0f8e342.jpg
                          Last edited by s0_big; 4 April 2021, 11:01.

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                          • Happy Easter! Fitted the new wheels again with a 3mm spacer in front, just to get a little more space between the tire/steering-rod. Yesterday me and the girlfriend enjoyed the car for a while. Well, maybe it was me that enjoyed it the most. The Supersprint Exhaust sound level is approved by the GF, that must be a good thing. (She drives a KIA diesel) so she doesn't like it loud inside. She only thinks the sound outside is a little embarrassing
                            Visited the local Porsche dealer for som photos. I really need to buy a camera and learn to take some better pictures, but this is what i managed to do.
                            Next up is to change front headlights/N75 Valve.

                            45764-71ba793655508e2a9e552626d864861b.jpg 45764-c502ef94c1c720809b8f2c82ad6e0256.jpg 45764-830f665606522c8d0ec66cdd065dd680.jpg

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                            • Any smile with drools out here?
                              The car looks fantastic.

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                              • Originally posted by _ShurikeN View Post
                                Any smile with drools out here?
                                The car looks fantastic.
                                Haha, maybe there was. Not so many People outside though. Looks warm in the pictures, but it was cold, about 3c.
                                Thank you!

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