14 replies to this topic

[tommobot]

Having a bit of a issue here with my new SC/d VX...

Not really sure what the issue is to be fair, or if their related but anyway....

Just to give a bit of background, SC Stage 2, Standard Manifold, VSE and Base Map. Ran like that for about 150miles then removed pre-cat. ...

Drilled out pre-cat, took it for a little spin and it sounded a bit different. Was going alright and then it suddenly almost I would say farted, bogged now and then started accelerating. Almost something similar to what Bargi is describing here... Anyway. Stopped car, started up again, and it did this sort of hesitation a few more times and then progressively less and less to barely at all now.

http://www.vx220.org...ing-under-load/

The other issue, possibly related or if its even a issue but couple of evenings ago driving along, maybe done 15 miles and noticed 91c on the display but the fan was on in the front, odd as I thought as it never ever used to come on unless manually done with the scangauge. Anyway, didn't think to much of it, no EML light and fan wasn't on when car started later on.

Today, driving along and car didn't feel as pokey as it has done, maybe mental thing. Randomly checked scangauge and came up with P1171.

P1171 - Fuel System Lean During Acceleration

Unfortunately on SC'd cars I can't seem to find to much information about this fault.

http://www.vx220.org...saga-continues/


Anyway, I've cleared the code, went out for a quick spin and the code hasn't returned and it feels silly quick again. If the fault doesn't flash back up does that mean its sorted itself, or is investigation required further? - I guess first port of call would be lambda sensors?

[Goosenka]

When cold I also find that the car has no drive so to speak when accelerating. Not hard accel but just standard if you like. It is almost like its blocked or really holding back. It almost feels like its a bit jerky. Once warm it's fine. I mentioned this in my thread a while back and the comments where that on cold the sc cars can be a bit like that. I have taken to leaving the car idling for 2 minutes or so before offski. I have a very similar set up Vse, stage 2 sc. not sure you mentioned whether this was after start up or not? I don't however have any codes but my fuelling contrary to a number of others is terrible on fuel. Edit to add - when are you getting it mapped? Personally speaking I would not keep it running on the base map for too long and you might find that it clears the issue.

Edited by Goosenka, 23 May 2012 - 08:07 AM.

[smiley]

I have the same when my tank was near empty, and i took a roundabout in a spirited way. System just shuts down. Wait a few sec, and you're good again. My basemap was also lean near the 6500 mark, so that can also trigger the ecu to respond in panic. I would suggest getting a final map with some dyno time showing what's going on the full rpm scale , and have CS fit the blue injectors if you're lean at the top (which they will probably come up with anyway).

Edited by smiley, 23 May 2012 - 08:05 AM.

[siztenboots]

from cold sounds like its over fuelling

[FLD]

There's a lean spot on the map at around 2250 rpm. Its where the maps switch from the low rpm hot/cold maps to the main map. Bit of a flat spot on mine when cold and bogs down a bit. Triggers 1171 and fans. Just a very minor flat spot when warm.

[NickB787]

I am no having a go here but a BASE map is just that designed to get the car running so you can get it to CMS to get it mapped properly as all cars will have different setups in mods. Have you booked it in also worth having a word with them see what they think don't keep driving it around just because the eml has gone out. It will be rich as a safety measure( base map) not good to run it like that for too long, possible fuel pump giving up under load?

Edited by NickB777, 23 May 2012 - 08:31 AM.

[FLD]

I missed the base map comment.

[JG]

Yep, base map is a bit lean at the top end, but i suspect you went round a corner a bit quick. or you have the slight issue with cyl4, wich also goes lean on some builds. Why? no one really knows as far as i can make out. Some say valve springs, others fuel pressure, the list goes on and on.

[Sutol]

Yep, base map is a bit lean at the top end, but i suspect you went round a corner a bit quick.

or you have the slight issue with cyl4, wich also goes lean on some builds. Why? no one really knows as far as i can make out. Some say valve springs, others fuel pressure, the list goes on and on.

Interesting, that would explain why the plug is a slightly different colour to the rest

[CocoPops]

Due to design of manifold? ie does Cyl4 get more Air than the rest?

[siztenboots]

is cyl4 the one with the EGR casting in the block

[Sutol]

is cyl4 the one with the EGR casting in the block

yep

[tommobot]

z

When cold I also find that the car has no drive so to speak when accelerating. Not hard accel but just standard if you like. It is almost like its blocked or really holding back. It almost feels like its a bit jerky.

Once warm it's fine. I mentioned this in my thread a while back and the comments where that on cold the sc cars can be a bit like that. I have taken to leaving the car idling for 2 minutes or so before offski.

I have a very similar set up Vse, stage 2 sc. not sure you mentioned whether this was after start up or not?

I don't however have any codes but my fuelling contrary to a number of others is terrible on fuel.

Edit to add - when are you getting it mapped? Personally speaking I would not keep it running on the base map for too long and you might find that it clears the issue.

Seems to only really be an issue with the holding back when cold / warming up. Every time from cold, without fail its been reluctant to accelerate at low speeds, but as you said after a while it disappears and everythings good.

It seems to be doing ok on fuel, not tooo dissimilar from what I had with a standard NA.

Its booked in for 12th June for mapping...

Edited by tommobot, 23 May 2012 - 09:22 AM.

[Sutol]

Joe told me it was something to do with the Throttle body recalibrating for the fueling

[Rally]

I hate to feel left out. Driving back from the Parrot last night, the car starts running rough - bogging down at low revs - and the fans are running. This evening I had a look with Torque and it shows up this 1171 error code. Clear it, reset the ecu, but the car is still running rough. Now, this is the first time I've had any trouble since completing the install and getting it mapped in January. I've done a fair bit of mileage including track with no bother so something must have broken. Having done the search and read up, it seems to me that it could be Lambda sensors or a pre-cat leak or cracked manifold. Any bets?