Check engline light flicks - simtec
11 July 2010, 12:48 AM
#1
Check engline light flicks - simtec
Never had a issue like this before, today i filled with tesco 99 and done about 20 miles no issues, then hit her hard in 3rd and check light flashed then i went into 4th and it flashed few times and stopped, only on hard boost. so i tested it a few times and it intermittently flashes when hit flat throttle. so im thinking det maybe. then when i got home i noticed idle was erratic up and down as if surging and also the rad fans are constant even after driving for 10 mins at 30 mph bk to house. i normally never have them on unless car is idling for ages. also my heater blowers don't work now, as of 2 days ago, the relay just clicks, dunno if its related to cooling system hence fans going mad
gonna have a look tomorro at whats going on, any adv would be brill.
its a 1998 v4 wrx, DIY engine built by me about 4k ago with no issues at all so far, simtec ecu mapped by jgm, 2.5k ago.
also yesterday i gave it beans up to mad speed, on private rd obviously and didn't get any lights on etc.
if i rev engine it all sound as should, no knocks or bangs, so that's how i would like to keep it
gonna have a look tomorro at whats going on, any adv would be brill.
its a 1998 v4 wrx, DIY engine built by me about 4k ago with no issues at all so far, simtec ecu mapped by jgm, 2.5k ago.
also yesterday i gave it beans up to mad speed, on private rd obviously and didn't get any lights on etc.
if i rev engine it all sound as should, no knocks or bangs, so that's how i would like to keep it
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11 July 2010, 01:18 AM
#9
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It's a shame the Simtek dosen't come with knock control similar to the standard ecu, as it's most like fuel related as Tesco have altered there fuel supplier recently. Try adding an octane booster and seeing whether any knock occurs, if this solves the problem you will need your map tweeked.
11 July 2010, 01:20 AM
#10
It's a shame the Simtek dosen't come with knock control similar to the standard ecu, as it's most like fuel related as Tesco have altered there fuel supplier recently. Try adding an octane booster and seeing whether any knock occurs, if this solves the problem you will need your map tweeked.
11 July 2010, 09:09 AM
#11
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as has been said it could be a bad / different tank of fuel.
the only worrying thing is the rad fans you mention.. do check water level and check for leaks, if it is low on water the engine will obviously run hotter.
the blower not working is unrelated to rad fans.. check the fuses.
Simon
the only worrying thing is the rad fans you mention.. do check water level and check for leaks, if it is low on water the engine will obviously run hotter.
the blower not working is unrelated to rad fans.. check the fuses.
Simon
11 July 2010, 09:46 AM
#12
I had a similar problem with the fans on my Simtek, but on a V5 though. They just wouldn't stop before I turned of the ignition. This doesn't happen with the stock ECU. Had some other problems too so I have returned it to Steve to let him check it out.
The competence in Simtek here in Sweden isn't that great.
The competence in Simtek here in Sweden isn't that great.
11 July 2010, 10:59 AM
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It's a shame the Simtek dosen't come with knock control similar to the standard ecu, as it's most like fuel related as Tesco have altered there fuel supplier recently. Try adding an octane booster and seeing whether any knock occurs, if this solves the problem you will need your map tweeked.
but then you have to pay a fair bit extra for an after market ecu with knock control normally.
also at least it lets you know, rather than just removing timnig and not letting you know..
pros and cons with either method etc.
Simon
11 July 2010, 07:01 PM
#17
if it still plays up, im guessing il have to being it to you, see what its doing. bloody cars. be gone if it carries on. new babys cost enough, never mind stupid cel coming on
shud i fit that td05 18g, and tubular headers seeing as it prob gonna come visit you. and bigger inj same sametime.
mmm why not lol
shud i fit that td05 18g, and tubular headers seeing as it prob gonna come visit you. and bigger inj same sametime.
mmm why not lol
Last edited by mje_wrx; 11 July 2010 at 07:05 PM.
11 July 2010, 07:01 PM
#18
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Andy f maps my simtek, and the check light is used to detect any abnormal engine noise (knock sensor). I was at knockhill 2 weeks ago and hit the limiter and the check light flashed a few times as andy had it mapped in just before the redline. I was running v power and 10% meth when it happened. Your mapper will know if he has set your ecu up like this.
11 July 2010, 08:25 PM
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The knock detection monitors engine noise on the frequency that knock/det is on.
Obviously other noise is on same frequency so you get a normal noise level reading that whilst listenning with detcan is not knock.
The knock warning is then set to flash the engine light at a noise level slightly higher than that.
That was done 2500miles and 3mths or so ago, and been fine.
The ecu has done its job and informed you of the det.
Your task is now to identify why which could be numerous reasons:
1)Bad tank of fuel.
2) failing fuel pump or fpr
3)split inlet pipe.
4) vac pipe off or split.
5)something loose vibrating.
6)something else.
The map doesnt change therefore something on the car has changed, or the fuel is carp.
However you mention rad fans on all the time which I presume is new and different with this issue?
Therefore you need to check water level, is it blowing water out the overflow by the battery?
Have you tested it with the octane booster in?
Of course I am more than happy to look at it to help find the problem
Simon
Obviously other noise is on same frequency so you get a normal noise level reading that whilst listenning with detcan is not knock.
The knock warning is then set to flash the engine light at a noise level slightly higher than that.
That was done 2500miles and 3mths or so ago, and been fine.
The ecu has done its job and informed you of the det.
Your task is now to identify why which could be numerous reasons:
1)Bad tank of fuel.
2) failing fuel pump or fpr
3)split inlet pipe.
4) vac pipe off or split.
5)something loose vibrating.
6)something else.
The map doesnt change therefore something on the car has changed, or the fuel is carp.
However you mention rad fans on all the time which I presume is new and different with this issue?
Therefore you need to check water level, is it blowing water out the overflow by the battery?
Have you tested it with the octane booster in?
Of course I am more than happy to look at it to help find the problem
Simon
Last edited by Jolly Green Monster; 11 July 2010 at 08:27 PM.
12 July 2010, 12:31 AM
#22
iv checked all the pipes they all fine. the relay clicking when bridged with wire actually powered rad fans. that relay would only click if heater fan speed switch on. maybe why fans going nuts. anyways. checked fuses, changed air con one and one other 20amp, not sure wa it did, but i changed it. now my fans come in and out when the are supposed to with no issues. the water was spot on in header tank. its a new walbro fuel pump. so il get some octane booster ordered and put it in and see what happens there. i personally think its fuel. nothing rattling, all seems spot on.
after octane booster if now joy, si, il be coming to see you with few mods on so u can tweak it a bit
after octane booster if now joy, si, il be coming to see you with few mods on so u can tweak it a bit
12 July 2010, 01:09 AM
#24
yeah probs sim, first big use of car in weeks. 1st time for that momentum fuel aswell, so i think thats why. shell only from now on. just ordered nf octane. shud be here tuesday. il happily go 4 a blast then haha testing. also gotta check heater motor tomorro. thanks for help sim. il let u know how i go. now doubt il see u soon, see how these headers upipe and turbo work. if they any good - had 320, so would like over 360 now
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