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Help! Suzi sounds like it's gonna explode under 2700 RPM.
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Author:  toastysteve [ Wed Aug 22, 2012 8:45 am ]
Post subject:  Help! Suzi sounds like it's gonna explode under 2700 RPM.
Hi guys hopefully someone knows where my problem's at.

About 2 years ago i did an engine conversion on my SJ70 WT -> G16B vitara engine, and it's been sweet since.

However, driving into work in it on Monday it started losing a lot of power when the REV are under 2.6k rpm. I.e. I'll be doing 60km/h on a flat, put it into 4th gear revs drop to 2K and I'll put my foot down a bit and the engine will sound sick (like it's running on 3 cylinders or something) and it won't get much power until revs = 2.6k-2.7k and then bam, off I go, everything sounds and feels great.

So far I've checked all my leads, removed and cleaned my plugs (they're only about a month old), but that's it.
It still idlling fine at around 700rpm - 800rpm.

Any suggestions or ideas appreciated. :)
Author:  350hp4agte [ Wed Aug 22, 2012 9:11 am ]
Post subject:  Re: Help! Suzi sounds like it's gonna explore at < 2.7K RPM.
what plugs did you put in? have you still got your old ones?
Author:  toastysteve [ Wed Aug 22, 2012 10:14 am ]
Post subject:  Re: Help! Suzi sounds like it's gonna explore at < 2.7K RPM.
Hey mate, the new ones were Bosch super plus cheapies. Not sure on the exact model off the top of my head F###DC+ I think. 8mm gap. From memory Bosch use the same plug for the G16A as well?
I don't have the oldies either, but I did buy some bosch platinum plugs to test this morning. I'll see how they go.
Author:  Fatzook [ Wed Aug 22, 2012 1:37 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explore at < 2.7K RPM.
Timing belt skipped a tooth?
Author:  toastysteve [ Wed Aug 22, 2012 1:58 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explore at < 2.7K RPM.
That's something I hadn't considered... I'll check this tonight, although if it had skipped a tooth I would think that the issue would be consistent at any RPM, wouldn't it?
Author:  BlueSuzy [ Wed Aug 22, 2012 2:17 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explore at < 2.7K RPM.
What modale Baleno? 98+Coilpack?

Check/fiddle with TPS?

My engine has dies on a freeway a couple of times, Fiddled with the Throttle Position Sensor Worked fine every since.





I wish my zook explore more
Author:  Fatzook [ Wed Aug 22, 2012 2:19 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explore at < 2.7K RPM.
toastysteve wrote:
That's something I hadn't considered... I'll check this tonight, although if it had skipped a tooth I would think that the issue would be consistent at any RPM, wouldn't it?



Possibly. But as the timing is advanced/ retarded it will compund any timing issues.
Author:  toastysteve [ Wed Aug 22, 2012 2:47 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explore at < 2.7K RPM.
BlueSuzy wrote:
What modale Baleno? 98+Coilpack?

Check/fiddle with TPS?

My engine has dies on a freeway a couple of times, Fiddled with the Throttle Position Sensor Worked fine every since.



Hey BlueSuzy, sorry mate. I must've been off somewhere else when I wrote first post. It's actually an ex Vitara engine, not Baleno (AFAIK). So yeah, no coil pack.
Author:  bigdogdazza [ Wed Aug 22, 2012 6:34 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Hmm mine doing EXACTLY the same thing 1.6 vitara efi, I changed dizzy cap and rotor button as they had some corrosion but problem still there.. Not as bad at the moment but still there
Author:  toastysteve [ Wed Aug 22, 2012 8:18 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Mmm, dizzy cap was my next move. Damn. I changed the plugs tonight without any joy.
Will have to wait till the weekend to check timing.
I want to check leads too. Have you done that Dazza?

It seems to happen mostly under load. I.e. going down a hill is okay, but going up one, or hill starting and you're gonna have a bad time.
Author:  BlueSuzy [ Wed Aug 22, 2012 9:04 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explore at < 2.7K RPM.
toastysteve wrote:
BlueSuzy wrote:
What modale Baleno? 98+Coilpack?

Check/fiddle with TPS?

My engine has dies on a freeway a couple of times, Fiddled with the Throttle Position Sensor Worked fine every since.



Hey BlueSuzy, sorry mate. I must've been off somewhere else when I wrote first post. It's actually an ex Vitara engine, not Baleno (AFAIK). So yeah, no coil pack.


ahah no problem :)
Author:  bigdogdazza [ Thu Aug 23, 2012 5:03 am ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Plugs/leads were to be my next step as well. Just out of curiosity do you have check engine light displayed? Mine has, and a wild stab here I am thinking o2 sensors faulty? Seems to be chewing through the fuel a little to. It's exactly same diagnosis as your car, misfiring under load and up to around 2800rpm then clears and takes off like a dog shot in the ass! My timing belt was replaced around 15,000kms ago so I am not really thinking timing issue....yet
Author:  toastysteve [ Thu Aug 23, 2012 8:14 am ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Hmm, no check engine light for me... But that could well be due to my hack wiring job...

I had another play last night. Changed out my plugs and replaced the battery (long shot), and still no good.
However I also had a fiddle with the sensors and the injector plugs... wiggled em around and removed a couple of easy access ones and cleaned them up a bit. Started her up and went for a quick run and it actually seems worse than before now. Hahaha, I guess that's progress?
Author:  bigdogdazza [ Thu Aug 23, 2012 12:38 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Sux doesn't it! I refuse to put it into a shop and pay big$$$$ for something minor.......yet!!!
Author:  Jerryx4 [ Thu Aug 23, 2012 12:54 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
check fuel filter. Mine got water in it ages back and when under load it would cut out something terrible, granted a G16A though
Author:  toastysteve [ Thu Aug 23, 2012 2:25 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Thanks for the suggestion Jerry. I have an RDO tomorrow so I'll take a look and see how I go.
It hasn't rained here in a while, but I suppose it could be clogged up anyway.
Author:  Jerryx4 [ Thu Aug 23, 2012 3:23 pm ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
my tank was contaminated thanks to caltex's shitty tanks :(
Author:  bigdogdazza [ Fri Aug 24, 2012 4:47 am ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Hmm will be checking mine on the weekend!
Author:  toastysteve [ Fri Sep 07, 2012 9:47 am ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Hi Dazza, just wondering if you managed to solve this?
I've been over in NZ for the past 2 weeks so haven't had a chance to try anything yet.
Author:  bigdogdazza [ Fri Sep 07, 2012 11:37 am ]
Post subject:  Re: Help! Suzi sounds like it's gonna explode under 2700 RP
Yes I did bud! Changed plugs, leads, rotor button/dizzy cap, also pulled maf sensor and cleaned that after finding wrong air filter (bit short doesnt seal airbox properly). Running fine now.
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