boostedbrick wrote:
Possibly the rings but I would of expected smoke
Not to say its your problem; but when my F10 decided to chew through oil like a 2stroke it still smoked very very little..... seemed to be burning most of it
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| Whats my misfire? G16B https://auszookers.com/forum/viewtopic.php?f=5&t=35136 |
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| Author: | boostedbrick [ Tue Aug 21, 2012 4:49 pm ] |
| Post subject: | Whats my misfire? G16B |
My motor is a Baleno G16B, use's a Vitara cam and dizzy with the Baleno cam position sensor. It has developed a misfire on CYL 1, I suspected a bad plug or lead. Swapping these out with bits from the G16B in my other sierra didn't help. I couldn't smell any fuel on the plug when I removed it, so I figured it was a fuel issue, possibly a blocked injector. Swapped in a working unit from the other sierra with no change. I thought it was possible the lead to the injector was bad, so I swapped injector leads between CYL1 and CYL2. These cylinders are batch fired so it doesn't matter swapping them, but it still wont fire on CYL 1. Possibly a fuel pressure issue but I doubt it, either way all connections were checked to make sure it wasn't sucking air. The pump is near new VL external. So going by that, if im getting fuel and spark all that could be missing is compression? There is no oil in the coolant, no coolant in the oil and no smoke out the exhaust.. So im pretty much at a loss as to what I should try now.. Any ideas would be great. |
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| Author: | oozuk [ Tue Aug 21, 2012 5:11 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
do a leak down test, then you can count out any leaking valves or rings |
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| Author: | bigdogdazza [ Tue Aug 21, 2012 6:33 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
If was leaking valve seat or cylinder rings smoky exhaust would be evident surely? I have a similar problem with g16b engined vitara, have replaced dizzy cap(white corrosion evident) rotor button(same) plugs and leads, misfire not as bad but still there!??? |
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| Author: | boostedbrick [ Tue Aug 21, 2012 7:02 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
I expect the head is fine, it was recoed around 1500km ago. Possibly the rings but I would of expected smoke. I will run a compression test on it, don't have the bits for a leak down test available. |
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| Author: | Highway-Star [ Tue Aug 21, 2012 7:16 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
boostedbrick wrote: Possibly the rings but I would of expected smoke Not to say its your problem; but when my F10 decided to chew through oil like a 2stroke it still smoked very very little..... seemed to be burning most of it
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| Author: | 3cyl [ Tue Aug 21, 2012 7:36 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
The injector itself? not the lead? Oh just read the first post properly, I should just shut up and stick with flintstone cars. |
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| Author: | boostedbrick [ Tue Aug 21, 2012 7:42 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
3cyl wrote: The injector itself? not the lead? I have swapped the injector with one from my soft top. Then i tried swapping the leads. /edit. To quick 3cyl. |
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| Author: | 3cyl [ Tue Aug 21, 2012 7:54 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
boostedbrick wrote: 3cyl wrote: The injector itself? not the lead? I have swapped the injector with one from my soft top. Then i tried swapping the leads. /edit. To quick 3cyl. Haha, read my post then your first one then thought  maybe if I fix it less people would realize I'm 'tarded.You sure it's always no.1? Also are the ecu of both cars interchangable? |
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| Author: | boostedbrick [ Tue Aug 21, 2012 8:08 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
Yep always cyl1, can pull a spark lead off and no change. That's pretty much how I have been testing what cylinder is not firing. Soft top is Vitara, different ECU. |
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| Author: | oozuk [ Wed Aug 22, 2012 12:11 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
boostedbrick wrote: I expect the head is fine, it was recoed around 1500km ago. Possibly the rings but I would of expected smoke. I will run a compression test on it, don't have the bits for a leak down test available. Granted worn oil rings will cause smoke but a burnt valve will not. was the compression even with the other cylinders ? |
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| Author: | boostedbrick [ Wed Aug 22, 2012 5:36 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
Dry cyl 1 150psi cyl 2 155psi cyl 3 158psi cyl 4 165psi Wet cyl 1 175psi cyl 2 180psi cyl 3 185psi cyl 4 185psi Off the top of my head the minimum allowed was around 170psi? |
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| Author: | redzook [ Thu Aug 23, 2012 7:19 am ] |
| Post subject: | Re: Whats my misfire? G16B |
did you check if your actually getting spark to the no1 cyl? i dont mean just swapping leads |
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| Author: | boostedbrick [ Thu Aug 23, 2012 7:29 am ] |
| Post subject: | Re: Whats my misfire? G16B |
I swapped plugs and leads. Checked the new plug was sparking. |
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| Author: | boostedbrick [ Thu Aug 23, 2012 9:07 am ] |
| Post subject: | Re: Whats my misfire? G16B |
Problem found, turns out I wasn't getting strong enough spark.. A new coil fixed the problem straight up. I'm surprised it only affected cyl 1, although it has the longest lead. |
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| Author: | oozuk [ Thu Aug 23, 2012 6:25 pm ] |
| Post subject: | Re: Whats my misfire? G16B |
yeah that compression is quite good, Great to hear you sorted the problem |
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