Help: VTEC stalling at 6k rpm

[crasherkid]

Hi Liam did you get the car sorted?
What was the issue causing it?

 

[Liamneale69]

Nope. they put it on the dyno and it was down on power I don't know how much by but they said they was an electrical fault or something with the vtec solenoid so they replaced it and it seemed to give it abit more power, running around 195 so still down a good 20ish. So they ended up checking everything mechanic and everything was how it should be, chain is good, valve clearance done, compressions all up and so on and was still running around 195. So they think it's something electrical and I've had to book it in again untill Paul comes back so they can put a kpro on it and read into it that way, I'm abit confused with it all to be honest, even they said they don't understand why it's playing up the way it is because it's practically standard my teg. So yeah back in on the 20th July for another go at it lol

 

[p1tse]

That is abit strange, I've only had my dc5 about 7 weeks and its been abit of a pain ever since due to this problem, ide suggest something but I ran out of ideas with mine lol it took me a while to get in touch aswell with tdi but it was back end of the day like half 5ish when I finally got in touch

Was it a fresh import or a uk car before; any know history or issues from previous owner? Was it always like that when first purchased?

 

[Liamneale69]

Yeah was in the uk before got loads of history for it and im not sure when it started if I'm honest. When I first got it felt fine then all of a sudden it just didn't feel the same, haven't had the car long and I messaged the guy I bought it off and he told me he's never had problems with it and was well looked after etc so yeah I'm abit lost with it. It's got 90,000 miles on it so it's not exactly big miles, I had a ep3 with 150 on it and that was sweet as a nut ran like a dream it was just Milano red/pink lol

 

[crasherkid]

Same here, I had an EP3 with over 140k on it but mechanically drove perfect, yet my car especially in higher gears just doesn't seem to pull like it should and feels sluggish.
I wonder if mine has anything to do with a sensor or the Speedo etc.
Did TDI charge you?

 

[wj51fut]

He's fully booked for a few weeks and the dates he has available I can't get off work
I rang TDI north and told them what had happened and same thing - they're busy for a few weeks until mid July if I can get time off work I'll go back there.
But they're gonna charge me for this which I feel is unfair considering the fault did start after they had done valve clearances on the car.
On the phone they quoted me about £75 for valve clearances but they charged me £170 because they charge by the hour and had my car for almost 3 hours.
All I additionally asked was to check the timing chain and make sure the Tegiwa induction kit was fitted correctly but felt a little ripped off to be honest.

That's rediculous!! If they quoted you £75 then that's what you pay. I paid £100 flat for Honda to do my valve clearances last week and no issues.

A couple of things to check.

Spark plugs
Coil packs
VTC gear (ticking)
Injectors
Fuel filter (very unlikely but you never know)
VTC spool gauze. This is the one infront of the engine behind the power steering pump. Two 10mm bolts.
VTEC solenoid gauze. Back of engine on the left.
Chain markings are lined up and it's hitting TDC.
Oil level

Grinspeed I've heard are good. TGM are ok but will have it for a month before looking at it. Don't take it to TDi north. Or you could try Hond-R if they reply to your emails.

Don't drive it unless it's to a garage. If it's not throwing up a code then it shouldn't be electrical it will be filter/gauzes/oil fed.

HTH

Adam

 

[p1tse]

Adam, was that Bristol Honda you used?
What did the £100 include, did it need new rocker gasket etc.?

 

[SamDC5]

Mine feels like it's doing this too. When I'm hitting Vtec between 6k-7k the car almost feels like it's holding back. I can feel myself almost being held back in my car because the car isn't pulling as it should.

As soon as I hit around 7k the car feels like it pulls as it should. I've never had or driven another DC5 so I don't anything to compare it to.

I don't know if it's just me or there is something wrong. You can hear and feel vtec engaging. I can only really feel it in 3rd gear too. Can anyone help?

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[Liamneale69]

Holloway thats exactly how mine feels, I think it's down on every gear but 3rd gear seems to be the worst. From 60mph - 80mph in 3rd gear feels flat like zero power, but apperently tdi are telling me that it's something ecu related, mechanically it's sound, everything they checked was fine timing everything you name it was how it should be so their going to look at the Ecu etc.

 

[SamDC5]

Holloway thats exactly how mine feels, I think it's down on every gear but 3rd gear seems to be the worst. From 60mph - 80mph in 3rd gear feels flat like zero power, but apperently tdi are telling me that it's something ecu related, mechanically it's sound, everything they checked was fine timing everything you name it was how it should be so their going to look at the Ecu etc.

I'm getting mine on a dyno on the 22nd so I can see if anything is wrong. I may go this week as it's doing my head in. Let me know how you get on mate.

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[SamDC5]

It's up until 7k it then starts to pull properly. I noticed it when I was along side my dad's UK MR2 rev 4, I wasn't pulling on him as much as I thought I should. In 4th I hit vtec and it just felt like I wasn't gaining much ground.

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[Liamneale69]

I had a play with my brothers ep3, and he had me all way threw the gears but it is 3rd where I seem to feel it the most. It's only running 190 - 195 on the dyno so it is down like 20ish. Mines booked back in on the 20th so hopefully they can fix it up lol good luck with yours anyway mate hope it gets sorted I know how it feels it's frustrating!

 

[hondamad2204]

Was that 195 at the wheels or the fly? From factory its 220ps not bhp, so 195 couldn't be too far off... All depends on the dyno as well, was ot a hot day? Etc etc.

With these hesitations...what air intakes are you running? Are they blocked? Are they open cone and suffering from heat soak? Are all he sensors plugged in around the throttle body?...has the throttle body been cleaned? Is it opening fully on wide open throttle? Could ot simply just need adjusting? What petrol are you using...supermarket special or vpower? Maybe even 95 ron? Fuel filter in tank been replaced?

Id also be taking it to a specialist by hook or by crook if all of the above has been checked. If your banging your heads against a brick wall going to one place, then try going somewhere else.

hopefully they are simple fixes, in the past any issues ive had with this type of hesitation have purely been poor intake choice (open cone and sitting in traffic on a hot day, a split intake hose, or when ive had no choice but to put 95 ron fuel in (which has only happened once in 6 years I might add) Lol

 

[Liamneale69]

Yeah my teg is practically standard and everything has been checked from my self and tdi, they checked literally everything they could do mechanically, that's why I need to bring it back in because Paul's on holiday and they need a kpro to put on so they can force the engine to do things etc, they told me it's running around 195 and should be around 215 on vpower so I'm not sure to be honest I'm only going by what they have told me. They said it's definitely down on power so I'm taking their word for it

 

[SamDC5]

Mine has a standard intake, I've also had my intake hose off and checked for any splits and it's fine.

I've only ever used Shell V-power never anything else. All sensors are plugged in and have been checked.

I haven't tried cleaning the throttle body but I personally can't see it being anything with the throttle body as it's fine above 7k.

Next week I'm replacing:

Spark plugs
Fuel filter
Vtec solenoid gasket and gause
Checking valve clearances

Mine hasn't been anywhere yet but I'm going to Tegiwa's dyno day on the 22nd.

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[p1tse]

^ as above, I was thinking along the lines of what Jimmer wrote

I'm no mechanic, but a car not feeling right, should it be put through dyno and the power output used as an indicator?

Tdi North work on many k20 engines so surprised on the above diagnosis

 

[SamDC5]

^ as above, I was thinking along the lines of what Jimmer wrote

I'm no mechanic, but a car not feeling right, should it be put through dyno and the power output used as an indicator?

Tdi North work on many k20 engines so surprised on the above diagnosis

Putting it on the dyno can confirm the power output. You can also take a look at AFR's to see what's happening.

Without a live data recorder like a K-pro you're pi**ing in the wind really.

As above I'm replacing and adjusting what I can to see if there's any improvements before taking it anywhere as those things will be first point of call.

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[Liamneale69]

That's why I'm leaving it with them to do what ever they need to do, end of the day they've told me that there's nothing wrong mechanically etc it's down to wiring or ecu so I'm just taking their word for it, like u said they deal with k20s all the time so they know what there doing. I'm just fed up with the situation and want it sorting lol

 

[MilanoChris]

I don't see how an ECU or electrical issue would cause the issue you're describing. Sounds like a knackered sensor of some form, knackered cat perhaps, exhaust baffles gone/broke.

 

[SamDC5]

I don't see how an ECU or electrical issue would cause the issue you're describing. Sounds like a knackered sensor of some form, knackered cat perhaps, exhaust baffles gone/broke.

If it was an electrical fault surely the EML would come on?

I've spoken to a few K20 gurus and they all say vtec solenoid or fuel filter. I'm going to replace both and see how I go from there.

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