Cold start - mornings
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- 2nd Gear
- Posts: 121
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Cold start - mornings
Why is it RS4s are crappy from morning cold starts!?
I've got mine remapped and I turn the engine on first thing in the morning and I've got to wait 20/30 secs before the revs calm down before I can pull away, even then it drives lumpy till you get going, why are these machines so bad early in the morning!?
I've got mine remapped and I turn the engine on first thing in the morning and I've got to wait 20/30 secs before the revs calm down before I can pull away, even then it drives lumpy till you get going, why are these machines so bad early in the morning!?
Modified standard exhaust Modified deflapped inlet manifold ported and polished
Head and valve decoke Performance K&N panel filter. Remapped. Lowered slightly (20mm) on KW performance springs Widened on 10mm spacers.
Head and valve decoke Performance K&N panel filter. Remapped. Lowered slightly (20mm) on KW performance springs Widened on 10mm spacers.
Re: Cold start - mornings
Mines exactly the same so your not alone lol
Re: Cold start - mornings
What map (if any) are you running - My MRC stage 2 runs fine from cold - a little lumpy but definatley usable immediately post button press. Have you had the coilpacks replaced?
- John Johnson
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Re: Cold start - mornings
Mines not lumpy
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B7 avant in Daytona with ceramics and a few other goodies and lowwwww miles
Ur quattro. lago Blue
Ur quattro. Mars red
Rs1600i
Transit custom sportvan
http://youtu.be/FWBUl7oT9sA
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- Neutral
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Re: Cold start - mornings
I'd get that checked out, mine runs spot on when cold - defo an issue there. Even if it was mapped, it shouldn't affect the cold start.
Re: Cold start - mornings
Mine before the stage 2 MRC map and after cold starts were and are just fine. If anything, the map has made it slightly better; the cold start 20-30 second wait is almost non-existent. Coil packs maybe?
VCDS scan and maybe get it checked out. What map do you have if any?
VCDS scan and maybe get it checked out. What map do you have if any?
Gone but never forgotten:
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
Re: Cold start - mornings
+1 the MRC Stage 2 with quiet start mode seems to be pretty decent from coldsync24 wrote:What map (if any) are you running - My MRC stage 2 runs fine from cold - a little lumpy but definatley usable immediately post button press. Have you had the coilpacks replaced?
Glacier White 2017 S3 Saloon with all the Tech.
Gone but not forgotten - B7 RS4 Saloon Black - H&R spacers, Tints, Gun Metal Alloys, MRC Stage 2, Pre Cats, Milltek Non Res, K/W Springs, MRC Full Carbon clean - 431ps
previous - B6 A4 1.8T S-Line 215PS
Gone but not forgotten - B7 RS4 Saloon Black - H&R spacers, Tints, Gun Metal Alloys, MRC Stage 2, Pre Cats, Milltek Non Res, K/W Springs, MRC Full Carbon clean - 431ps
previous - B6 A4 1.8T S-Line 215PS
Re: Cold start - mornings
Mine seems fine most of the time because by the time I drive off the driveway/manoeuvre out of a space it is fine. However, when it is cold (engine and outside temp) and I pull straight out of a car park space it does stutter and hold back a bit. By the time I get to the exit it is fine or if I had to reverse or 3 point turn to get out of a space first it is warmed up by then and fine. It literally is the first 10 seconds of turning on. Only ever noticed it after my remap. I assumed it was something to do with the SAI that I had removed at the same time.
Re: Cold start - mornings
It could be that the lambda sensor(s) is(are) done. I had one replaced and car runs much smoother on cold starts. I also get little better mpg than before.
Re: Cold start - mornings
Mines fine pre and post MRC cold start map.
Sounds like you have a problem. Take it back to whoever mapped it.
Sounds like you have a problem. Take it back to whoever mapped it.
RS4 B7, Mugello Blue, K&W V3 & HR ARBs, set up by Centre Gravity, Milltek Valved Non Res & cat bypass pipes, BMC air filter, braided hoses, DOT 5.1, Terraclean, MRC Full Carbon Clean, MRC remap 448PS 477NM, 20" S7 alloys with 4mm spacers & Hawke spigots 66.6 > 57.1, AP Racing front discs. Sold Sept 2019. Now rocking an F80 M3
Re: Cold start - mornings
Do any of the people who say their cars are fine have their SAI removed? And do you pull away immediately from a cold start within 2 seconds of it starting and not crawl away? Like I said, if I'm parked in a space or on driveway I'd never notice it so some of you might just not have noticed because of where you park.
Re: Cold start - mornings
Mine still has the SAI - I pull away after the 10 seconds and its fine. Having said that, I've pulled away immediately and never noticed it to be lumpy or difficulty... I think the MRC stage 2 map helps a lot...MikeFish wrote:Do any of the people who say their cars are fine have their SAI removed? And do you pull away immediately from a cold start within 2 seconds of it starting and not crawl away? Like I said, if I'm parked in a space or on driveway I'd never notice it so some of you might just not have noticed because of where you park.
Gone but never forgotten:
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
2007 RS4 B7 Saloon, Metallic Silver with SS+.
LED's all round and Dectane LED tailights. KDS detail and paint. Lepsons black chrome, heavy on the silver wheels. JCWeldFab full system - valved and no pre-cats. MRC stage 2, de-flap and full carbon clean - 438PS and 489NM. HEL brake lines. H&R Spacers. Gtechniq C1 and EXO V2 coatings. 2010+ RNS-E. On the MRC dyno: http://youtu.be/y_k0VJ2--y8
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- 4th Gear
- Posts: 548
- Joined: Wed Nov 10, 2010 10:10 pm
- Location: Kernow, near England
Re: Cold start - mornings
Mine's standard but I've never had a problem. I just wait for the fast idle to drop back then drive away and everything's fine.
2007 B7 RS4 Phantom Black Saloon - stock
Previous: Lightly modded Mondeo ST220 (great car), nothing else worth mentioning!
Previous: Lightly modded Mondeo ST220 (great car), nothing else worth mentioning!
Re: Cold start - mornings
Could be the ecu software update is needed here???
2006 RS4 Avant - Carbon Clean, Intake Ports Polished, HF Air Filter, MRC Remap
1998 Toyota Supra 3.0 TT - de-cat, bleed valve, UK Spec Brakes, HKS Springs & CW Dampers, Goodridge Lines, Pagid Pads & 360 RWHP
1990 Toyota Supra 3.0 T - de-cat, HKS Boost Controller (1.4 bar max), used as a daily drive for 110k miles on original turbo!
198x Granada 2.8i Ghia X - Can't remember the exact year - but a great car!
1998 Toyota Supra 3.0 TT - de-cat, bleed valve, UK Spec Brakes, HKS Springs & CW Dampers, Goodridge Lines, Pagid Pads & 360 RWHP
1990 Toyota Supra 3.0 T - de-cat, HKS Boost Controller (1.4 bar max), used as a daily drive for 110k miles on original turbo!
198x Granada 2.8i Ghia X - Can't remember the exact year - but a great car!
Re: Cold start - mornings
My one used to run a bit rough on start up until I changed out the PCV valve.
Misano Red RS4 B7 Avant
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