RunX RSi

[Dave465]

Got a 2003 RunX RSi with 330k on the clock, recently noticed the car shaking alot at idle. Did a compression test and saw cylinder twos’ compression is about 30% lower than the others *

Any ideas as to what the cause of this is ?

Thanks

 

[Rickster]

Worn out piston rings im guessing.

 

[Lord Farquart]

Worn rings. Valves not seating properly anymore. Needs an engine overhaul. Dropping a bit of oil in the chamber before doing the compression test could possibly indicate if it is rings or valves. At 330k km I would not even bother . Just do an overhaul.

That car needed an engine overhaul at 0km to replace the lost ponies. Pretty sure that's the model Toyota over-quoted the hp.

 

[ubercal]

Got a 2003 RunX RSi with 330k on the clock, recently noticed the car shaking alot at idle. Did a compression test and saw cylinder twos’ compression is about 30% lower than the others *

Any ideas as to what the cause of this is ?

Thanks

Dont guess , do a leakdown test.That will show you where the loss of compression is

 

[3Gee]

Dirty throttle body

 

[genetic]

Dirty throttle body

A dirty throttle body won't cause a loss of compression in one cylinder.

It's almost definitely rings or valves. Not a cheap repair either way.

 

[3Gee]

dirty throttle body based on the initial rough idle.

Wouldn't the engine be smoking and using oil due to worn rings?

 

[Dolby]

That car needed an engine overhaul at 0km to replace the lost ponies. Pretty sure that's the model Toyota over-quoted the hp.

I thought so too ... but the car actually ran well at the coast, and actually ran with cars at similar power. I remember at the coast a Golf 5 GTI and RunX were fairly close. But up at 1.600km+ the N/A and strangulation were severe. Realistically, I could run with 110-115KW NA cars ...

 

[genetic]

dirty throttle body based on the initial rough idle.

Wouldn't the engine be smoking and using oil due to worn rings?

At 330k km, I'm sure it is.

 

[WaxLyrical]

Check HT leads just to be sure.

 

[semisane1987]

Got a 2003 RunX RSi with 330k on the clock, recently noticed the car shaking alot at idle. Did a compression test and saw cylinder twos’ compression is about 30% lower than the others *

Any ideas as to what the cause of this is ?

Thanks

Any chance maybe you selling it my cousin want that car desperately.

 

[TheChamp]

I thought so too ... but the car actually ran well at the coast, and actually ran with cars at similar power. I remember at the coast a Golf 5 GTI and RunX were fairly close. But up at 1.600km+ the N/A and strangulation were severe. Realistically, I could run with 110-115KW NA cars ...

That Runx RSI is a legend of NA cars.

 

[Lord Farquart]

Check HT leads just to be sure.

Wrong tyre pressures would also cause the symptoms described.

 

[SauRoNZA]

Wrong tyre pressures would also cause the symptoms described.

I lolled.

 

[Lord Farquart]

I thought so too ... but the car actually ran well at the coast, and actually ran with cars at similar power. I remember at the coast a Golf 5 GTI and RunX were fairly close. But up at 1.600km+ the N/A and strangulation were severe. Realistically, I could run with 110-115KW NA cars ...

Was the car not quoted at 141kw or something? And that is where the controvercy started? So you running with 110-115kW cars adds up. 141kW was considered to be way more than the engine actually delivered. Unless you knew the dyno kW of each car you raced, and the 110-115kW was wheel horses?

http://www.carmag.co.za/news-blog/toyota-runx-rsi/

 

[Dolby]

Was the car not quoted at 141kw or something? And that is where the controvercy started? So you running with 110-115kW cars adds up. 141kW was considered to be way more than the engine actually delivered. Unless you knew the dyno kW of each car you raced, and the 110-115kW was wheel horses?

http://www.carmag.co.za/news-blog/toyota-runx-rsi/

Yea it was 141kw and that is where the controversy started, as it didn't perform like a 141kw ... at altitude.

I think I remember it being at just under 9 seconds up here. But the same car at the coast (Carmag, if I recall) was around 7.8 seconds sprint ... so the engine did actually develop that power (if it didn't, then 7.8 seconds is blistering time!)

A ran marginally quicker than a stock Fiesta ST at the time - which wasn't bragging because it was 112kw vs 141kw, so you'd have thought the RunX would run away from it. We're essentially saying the same thing I think?

 

[A3@MBB]

SA Motorsport created the T-class so that Toyota motorsport can save face in local races...

 

[ubercal]

how many times do people want to guess .. do a fricken leakdown test , that will tell is it the pistons rings , intake valves or the exhaust valves.

 

[chickenbeef]

Low blinker fluid could cause that, get it checked out first.

 

[Splinter]

Got a 2003 RunX RSi with 330k on the clock, recently noticed the car shaking alot at idle. Did a compression test and saw cylinder twos’ compression is about 30% lower than the others *

Any ideas as to what the cause of this is ?

Thanks

You did a compression test and ask us for the answer? How does one do a compression test?