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| G16b runs shit https://www.auszookers.com/forum/viewtopic.php?f=5&t=54498 |
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| Author: | Colin [ Wed Aug 16, 2017 11:39 am ] |
| Post subject: | G16b runs shit |
Hey everyone. I have an 89wt sierra with a g16b (from x90) It only seems to run on 3cyl. Has spark to all 4. Has fuel to fuel rail. Timing is right. I pull no.3 spark lead off and it doesn't change idle. Just wondering where the logical place to look would be? Cheers. |
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| Author: | fordem [ Wed Aug 16, 2017 12:24 pm ] |
| Post subject: | Re: G16b runs shit |
Have you tried changing the plug? Is the injector firing? |
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| Author: | bumstein [ Wed Aug 16, 2017 3:11 pm ] |
| Post subject: | Re: G16b runs shit |
Vacuum leaks are worth exploring for. I'm not familiar with the G16B but a vacuum leak can cause a single cylinder to misfire |
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| Author: | Colin [ Wed Aug 16, 2017 5:18 pm ] |
| Post subject: | Re: G16b runs shit |
Have swapped plugs around with no changing results Not sure how to tell without pulling injectors out? Will have a close look/test the vacuum hoses. Thanks |
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| Author: | MrRocky [ Wed Aug 16, 2017 6:39 pm ] |
| Post subject: | Re: G16b runs shit |
Fuel filter, dirty tank What fuel pump setup are you running ? |
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| Author: | tanshi [ Thu Aug 17, 2017 10:38 am ] |
| Post subject: | Re: G16b runs shit |
you should be able to check the injector pulse signal on the injector plug with a test light to see if all are pulsing |
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| Author: | Colin [ Fri Aug 18, 2017 2:41 pm ] |
| Post subject: | Re: G16b runs shit |
Hesitates and backfires. Still no number three. Vac hoses look ok. In tank pump (coily maybe). New fuel and filter. All injectors are pulsing. Could there still be blockage? I think compression test next? |
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| Author: | MrRocky [ Fri Aug 18, 2017 2:59 pm ] |
| Post subject: | Re: G16b runs shit |
Does it run a crank angle sensor in the front of the sump ? |
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| Author: | fordem [ Sat Aug 19, 2017 12:16 am ] |
| Post subject: | Re: G16b runs shit |
Colin wrote: All injectors are pulsing. Could there still be blockage? Yes. |
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| Author: | MrRocky [ Sat Aug 19, 2017 8:21 am ] |
| Post subject: | Re: G16b runs shit |
Backfiring normally means timing related not fuel, if the motor runs a crank sensor then this could be the issue, coilpacks normally break down and hesitate but no backfiring |
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| Author: | tanshi [ Mon Aug 21, 2017 11:23 am ] |
| Post subject: | Re: G16b runs shit |
depends if there is fuel getting to the exhaust unburned and then igniting |
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| Author: | Colin [ Mon Aug 21, 2017 4:01 pm ] |
| Post subject: | Re: G16b runs shit |
MrRocky wrote: Backfiring normally means timing related not fuel, if the motor runs a crank sensor then this could be the issue, coilpacks normally break down and hesitate but no backfiring Not sure a crank angle sensor would isolate the problem to no.3 cyl? Compression test is all good! Guess I'll be pulling the injectors out. Is there any way to test on the bench? Or should i be taking them to a mechanic? Cheers |
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| Author: | tanshi [ Mon Aug 21, 2017 4:14 pm ] |
| Post subject: | Re: G16b runs shit |
something like this maybe https://www.youtube.com/watch?v=xvkRZWBG6vs |
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| Author: | alien [ Tue Aug 22, 2017 7:44 am ] |
| Post subject: | Re: G16b runs shit |
Mine backfired and 'missed' like mad when the stems had died (leads, whatever) - At first it was just one of them, then suddenly it was un drive-able when the coil pack went and took out two cylinders. While it's running, unplug each stem and see if there's one that makes no difference.. that'll help isolate it if it's them. |
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| Author: | tanshi [ Tue Aug 22, 2017 8:08 am ] |
| Post subject: | Re: G16b runs shit |
alien wrote: Mine backfired and 'missed' like mad when the stems had died (leads, whatever) - At first it was just one of them, then suddenly it was un drive-able when the coil pack went and took out two cylinders. While it's running, unplug each stem and see if there's one that makes no difference.. that'll help isolate it if it's them. already did this |
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| Author: | Dalahare [ Tue Aug 22, 2017 11:06 am ] |
| Post subject: | Re: G16b runs shit |
Move injector to another cylinder and see if the problem moves across. |
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| Author: | Colin [ Thu Aug 24, 2017 3:42 pm ] |
| Post subject: | Re: G16b runs shit |
Well i pulled it all apart and then put it all back together and she's running on all 4! New problem! Starts fine, idles high (2500rpm). Once warm, it surges quite fast between 1500 and 1800rpm. What problems have others experienced resulting in these symptoms? Cheers |
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| Author: | Gwagensteve [ Thu Aug 24, 2017 3:46 pm ] |
| Post subject: | Re: G16b runs shit |
air in coolant lines to the throttle body. Clean IAC valve |
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| Author: | MrRocky [ Thu Aug 24, 2017 4:16 pm ] |
| Post subject: | Re: G16b runs shit |
Id try find a complete throttle body to swap and iac |
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| Author: | tanshi [ Thu Aug 24, 2017 4:32 pm ] |
| Post subject: | Re: G16b runs shit |
its been sitting for a while so im betting on a sticky IAC |
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| Author: | MrRocky [ Thu Aug 24, 2017 5:01 pm ] |
| Post subject: | Re: G16b runs shit |
I never have much luck just cleaning the iac always seem to end up swapping the whole assembly over as a fix |
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| Author: | Colin [ Thu Aug 24, 2017 5:03 pm ] |
| Post subject: | Re: G16b runs shit |
Yay bit of wax and grease remover and paint brush iac and throttle valve and she purrs like a kitten! |
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| Author: | Colin [ Thu Aug 24, 2017 5:04 pm ] |
| Post subject: | Re: G16b runs shit |
Thanks all. |
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| Author: | tanshi [ Fri Aug 25, 2017 8:07 am ] |
| Post subject: | Re: G16b runs shit |
Result! |
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| Author: | RhysE [ Fri Aug 25, 2017 5:18 pm ] |
| Post subject: | Re: G16b runs shit |
How exactly is the IAC cleaned ? And how do I remove it. On a baleno g16b ? Cheers |
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| Author: | Colin [ Fri Aug 25, 2017 9:50 pm ] |
| Post subject: | Re: G16b runs shit |
Will take a pic tomorrow. |
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| Author: | RhysE [ Fri Aug 25, 2017 10:02 pm ] |
| Post subject: | Re: G16b runs shit |
Legend Thanks mate |
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| Author: | Colin [ Mon Aug 28, 2017 5:08 pm ] |
| Post subject: | Re: G16b runs shit |
RhysE wrote: How exactly is the IAC cleaned ? And how do I remove it. On a baleno g16b ? Cheers Pull this off and use carby cleaner and toothbrush and clean throttle valve. There is also a little bypass valve that controls idle, clean this too! |
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| Author: | RhysE [ Mon Aug 28, 2017 5:47 pm ] |
| Post subject: | Re: G16b runs shit |
Awesome thankyou my baleno motor looks abit different but I should be able to find that part aswell anyways |
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| Author: | Cable_Tyy [ Sun Sep 05, 2021 7:07 pm ] |
| Post subject: | Re: G16b runs shit |
Colin wrote: RhysE wrote: How exactly is the IAC cleaned ? And how do I remove it. On a baleno g16b ? Cheers Pull this off and use carby cleaner and toothbrush and clean throttle valve. There is also a little bypass valve that controls idle, clean this too! That’s just the TPS isn’t it? IAC is under it with coolant lines attached? |
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