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| GV engine problems http://auszookers.com/forum/viewtopic.php?f=5&t=34061 |
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| Author: | Bokoshi [ Wed Jul 11, 2012 5:00 pm ] |
| Post subject: | GV engine problems |
I'm having a cutout/hesitation issue with my soft top GV. Mainly noticeable on light acceleration around 1.5 - 2k rpm but can happen at any rpm, its not constant and seems rather random. The problem is like it hiccups and drops all power for a split second and recovers as it never happened. I'm at my wits end trying to diagnose the problem, so far I have: Replaced fuel pump - no change Cleaned out EGR valve with new gasket - no change Had injectors and fuel rail cleaned yesterday - no change Put new earth leads onto engine - no change New battery - no change New spark plugs (platinum) - no change New timing belt - no change The timing was out by ~5 degrees advanced which i fixed but made no difference, I actually lost power =/ The fuel pressure was a little low on the gauge so I manually regulated the fuel pressure to spec by clamping the return line but the problem still remained. I have individually unplugged the egr, evap system, o2 sensor but no change. I have also used a diagnostic computer and taken it for a few runs but nothing obvious shows up on the readings, no sensor dropouts/incorrect readings. The camshaft position sensor housing is full of oil, is that normal or should it be dry? Anyone had sometinh glike this issue The car is a 2000 Grand Vitara soft top with G16B efi engine. |
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| Author: | gravity_powered [ Wed Jul 11, 2012 9:05 pm ] |
| Post subject: | Re: GV engine problems |
Sounds like what my V6 was doing before an oxygen sensor packed up. I happened intermittently for quite a few months before the engine light finally came on. Cam sensor being full of oil doesn't sound right to me either. |
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| Author: | twitchy [ Wed Jul 11, 2012 9:12 pm ] |
| Post subject: | Re: GV engine problems |
gravity_powered wrote: Sounds like what my V6 was doing before an oxygen sensor packed up. I happened intermittently for quite a few months before the engine light finally came on. Cam sensor being full of oil doesn't sound right to me either. +1 That is eggzackerly what mine did when the O2 sensor shit itself... With the cam being 5 degrees advanced it will give you more power through bottom end-mid range & you loose a tiny bit off the top. Quite a common mod on a lot of cars. |
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| Author: | Bokoshi [ Thu Jul 12, 2012 7:21 am ] |
| Post subject: | Re: GV engine problems |
Thanks guys, I will try and source a O2 sensor locally today. I'll pull the cam sensor housing off next week and reseal it. Heres hoping.. |
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| Author: | BlueSuzy [ Thu Jul 12, 2012 2:43 pm ] |
| Post subject: | Re: GV engine problems |
Does it have a TPS? |
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| Author: | JrZook [ Thu Jul 12, 2012 4:06 pm ] |
| Post subject: | Re: GV engine problems |
Yep . |
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| Author: | BlueSuzy [ Thu Jul 12, 2012 4:54 pm ] |
| Post subject: | Re: GV engine problems |
ive had problems where my tps lost something then car would die, then come alive again. Doing 110 uphil on a freeway in traffic, this is not good! I loosened the tps and wiggled, and did it back up. Problem gone. Weird, but someone else has had this prob also, cant remember who. |
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| Author: | Bokoshi [ Thu Jul 12, 2012 6:01 pm ] |
| Post subject: | Re: GV engine problems |
I don't think its the TPS. I have taken it off and checked with a multimeter, doesn't drop out across the whole range. Scan tool doesn't show any dropout on it either when it hiccups. I'll have a play with it none the less just to be sure. |
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| Author: | oozuk [ Thu Jul 12, 2012 6:17 pm ] |
| Post subject: | Re: GV engine problems |
have you checked the resistance of your ignition leads ?? |
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| Author: | Bokoshi [ Fri Jul 13, 2012 6:36 am ] |
| Post subject: | Re: GV engine problems |
Havent actually run a multimeter over the leads yet but I put my gti swift leads on it (read: bastardised them to fit down the plug holes), didnt make any noticable difference. However I am starting to think its either leads or coil packs, but the service manual has no mention to what the resistances of the coils should be. |
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| Author: | royce [ Fri Jul 13, 2012 6:46 am ] |
| Post subject: | Re: GV engine problems |
Same engine, different ECU system, would have a light hesitation when you just push the pedal to accelerate in crawling traffic etc at low revs, adjusting the TPS fixed it |
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