1000-2000 RPM flatspot - Toyota Yaris Forums

mr_grumble · 08-29-2007, 10:58 PM

Hi guys, my names Steve, I know this isn't strictly 'yaris' related but I'll ask the question all the same

I recently traded my 97 Starlet in on a 02 Echo and while I am happy with the purchase I have a small problem I am trying to nut out.

I have a deadspot in acceleration from 1000-2000 rpm. I mainly notice it coming out of 1st and into 2nd, kind of falls right into the deadzone. Coming up to 2000rpm, it's quite a define step back to full acceleration.
Happens both when cold and hot, occasionally for what ever reason it will go away for a gearchange but 95% of the time theres a deadspot.

I initially thought plugs, so I went out and changed them without success. I then went out and changed air filters, still no change.

The vehicle has 75,000 km (45,000 M) and is manual transmission.

Can anyone suggest what the problem may be. I am reasonably familiar with late model vehicles, just don't want to dive in and start replacing bits that dont' need to be replaced, would be nice to be able to have an educated guess.

Cheers,

Steve

Speedz · 08-30-2007, 01:18 AM

Thats the 'characteristic' of the VVTI engine... you get useful power from 2000rpm up...

I stall it plenty of times... in fact have been stalling it again lately...
'shameful'... lol

mr_grumble · 08-30-2007, 01:22 AM

Quote:

Originally Posted by Speedz

Thats the 'characteristic' of the VVTI engine... you get useful power from 2000rpm up...

oK......

My old Starlet used to have heaps more ommmph down there ?

I take onboard what you've said but it makes the car VERY unfriendly to drive !
I would tend to think it's not meant to be quite this bad

Speedz · 08-30-2007, 01:36 AM

Hmm... well... the Starlet obviously considered as 'old tech'... when compared to the newer VVTI...

Think of it like the VTEC engine from Honda... u get nothing below 5000rpm and from 5000 to 8000rpm the engine goes like a screaming bashee... similar to Toyota's VVLi in the old Corolla Sportivos...

VVTi is simliar but without the extra 'cam'... at 5000rpm

haha hope i make some sense here... lol

Masteraal · 08-30-2007, 04:33 AM

maybe go down to the dealer and see if u can borrow someone for 10mins so you can show them?

firez3r0 · 09-05-2007, 06:57 AM

i dont get it.wad do u mean by deadspot acceleration there?

Masteraal · 09-07-2007, 12:37 PM

LOL! i got my car today and i know what u mean "go motherf.... go!!!!" it just doesnt until it get to about 25 in 2nd then goes.

SHOCKING uphill at well... my god its bad. needs some torque down there..

oh well..

hasher22 · 09-07-2007, 09:37 PM

Quote:

Originally Posted by Masteraal

LOL! i got my car today and i know what u mean "go motherf.... go!!!!" it just doesnt until it get to about 25 in 2nd then goes.

SHOCKING uphill at well... my god its bad. needs some torque down there..

oh well..

Omg the yaris is the worst in uphill driving

i dont really like the yaris's acceleration..... :(

Ferret_san · 09-07-2007, 10:27 PM

Quote:

Originally Posted by hasher22

Omg the yaris is the worst in uphill driving(

Ahhh... nope that belongs to the Suzuki Swift.

firez3r0 · 09-08-2007, 04:53 PM

i think its realli a bad when it comes to hill climbing.i always got overtook when climbing up hills .. and you know that feeling sucks.lol.

limited · 10-21-2008, 03:31 PM

ok with your 'deadspot'try removing the air flow meter from the intake box, clean it out the hotwire resistor with some ELECTRIC CONTACT CLEANER.And try a modified air intake.On my yaris I have fitted a K&N filter on a short custom made 2'5in pipe.Helps a lot with responsiveness.

08-29-2007, 10:58 PM	#1
mr_grumble Drives: 2003 Echo Join Date: Aug 2007 Location: Australia Posts: 2	1000-2000 RPM flatspot Hi guys, my names Steve, I know this isn't strictly 'yaris' related but I'll ask the question all the same I recently traded my 97 Starlet in on a 02 Echo and while I am happy with the purchase I have a small problem I am trying to nut out. I have a deadspot in acceleration from 1000-2000 rpm. I mainly notice it coming out of 1st and into 2nd, kind of falls right into the deadzone. Coming up to 2000rpm, it's quite a define step back to full acceleration. Happens both when cold and hot, occasionally for what ever reason it will go away for a gearchange but 95% of the time theres a deadspot. I initially thought plugs, so I went out and changed them without success. I then went out and changed air filters, still no change. The vehicle has 75,000 km (45,000 M) and is manual transmission. Can anyone suggest what the problem may be. I am reasonably familiar with late model vehicles, just don't want to dive in and start replacing bits that dont' need to be replaced, would be nice to be able to have an educated guess. Cheers, Steve

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08-30-2007, 01:18 AM	#2
Speedz Will work for Yaris... Drives: Yaris Join Date: Feb 2006 Location: Brisbane, Australia Posts: 191	Thats the 'characteristic' of the VVTI engine... you get useful power from 2000rpm up... I stall it plenty of times... in fact have been stalling it again lately... 'shameful'... lol

08-30-2007, 01:36 AM	#4
Speedz Will work for Yaris... Drives: Yaris Join Date: Feb 2006 Location: Brisbane, Australia Posts: 191	Hmm... well... the Starlet obviously considered as 'old tech'... when compared to the newer VVTI... Think of it like the VTEC engine from Honda... u get nothing below 5000rpm and from 5000 to 8000rpm the engine goes like a screaming bashee... similar to Toyota's VVLi in the old Corolla Sportivos... VVTi is simliar but without the extra 'cam'... at 5000rpm haha hope i make some sense here... lol

08-30-2007, 04:33 AM	#5
Masteraal View User's Garage Drives: Black Yaris YRS 3dr Manual Join Date: Aug 2007 Location: Sydney Australia Posts: 191	maybe go down to the dealer and see if u can borrow someone for 10mins so you can show them?

09-05-2007, 06:57 AM	#6
firez3r0 Ready to Mod ! View User's Garage Drives: YRS Sedan Join Date: Jul 2007 Location: Canberra, Australia Posts: 105	i dont get it.wad do u mean by deadspot acceleration there?

09-07-2007, 12:37 PM	#7
Masteraal View User's Garage Drives: Black Yaris YRS 3dr Manual Join Date: Aug 2007 Location: Sydney Australia Posts: 191	LOL! i got my car today and i know what u mean "go motherf.... go!!!!" it just doesnt until it get to about 25 in 2nd then goes. SHOCKING uphill at well... my god its bad. needs some torque down there.. oh well..

09-08-2007, 04:53 PM	#10
firez3r0 Ready to Mod ! View User's Garage Drives: YRS Sedan Join Date: Jul 2007 Location: Canberra, Australia Posts: 105	i think its realli a bad when it comes to hill climbing.i always got overtook when climbing up hills .. and you know that feeling sucks.lol.

10-21-2008, 03:31 PM	#11
limited Drives: 2007 toyota yaris YR Join Date: Oct 2008 Location: adelaide, south australia, australia Posts: 5	ok with your 'deadspot'try removing the air flow meter from the intake box, clean it out the hotwire resistor with some ELECTRIC CONTACT CLEANER.And try a modified air intake.On my yaris I have fitted a K&N filter on a short custom made 2'5in pipe.Helps a lot with responsiveness.