antmcbane
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Looking for source of issue (2nd gen 3s-gte)...
Car has developed issue(s) over the previous few months: - Car will start a bit rough - sometimes have to crank it twice but the second time it always catches... sort of rumbles up from 300-~1300rpm over a second and then will come down to ~800rpm idle after a minute or so - Car will vibrate when warmed up at lights (goes away if i press the throttle at all) - Car will jerk in 1st gear if i go WOT (MUCH worse going uphill) - Shifts in to second gear will sometimes jerk - When I go hard on boost a couple of times the car begins to smell like a BP servo - Fuel economy is ~10km/L which I thought was OK but apparently I should be seeing better considering I don't go WOT all that often The car still feels reaal strong on and off boost though. Have recently changed fuel filter, fixed MAF & engine mounts (thinking the jerking might be a mount issue) & replaced stock BPV which reduced fuel smell considerably, but it's smelly now. Wondering if anybody has any bright ideas - I think it's likely to be a fuel (pressure reg or injector) issue at this stage but I dont want to go willy nilly replacing 100 things until it works properly if anybody has any better ideas.
post edited by antmcbane - 2016/05/21 14:34:05
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track_mr2
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Re: Looking for source of issue (2nd gen 3s-gte)...
2016/05/21 14:34:08
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Could be ignition related.....would explain hard to start, issues at WOT and fuel smell. If you are getting unburnt fuel because you have a misfire on a cylinder or weak spark in general. I'd start by pulling out spark plugs, see if one is darker then the others, that will tell you if its one cylinder or all cylinders having an issue. Check resistance of ignition leads, check coil, rotor button and distributor cap.
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track_mr2
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Re: Looking for source of issue (2nd gen 3s-gte)...
2016/05/21 14:35:37
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Actually before all that, pull the fault codes and see if anything is registered, could be cold start injector related also or temp sensor.
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antmcbane
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Re: Looking for source of issue (2nd gen 3s-gte)...
2016/05/21 15:38:25
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This might sound stupid - but if I don't get any CEL's, can I still get codes in diagnostic mode? And do I need to drive the car around (get it up to temp) before looking?
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antmcbane
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Re: Looking for source of issue (2nd gen 3s-gte)...
2016/05/21 15:46:44
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Ok without running it etc before it's just continuous pulsing which i take to mean no codes
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antmcbane
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Re: Looking for source of issue (2nd gen 3s-gte)...
2016/05/21 16:42:15
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Got oil in spark plug wells presumably from leaking VC gasket... thankfully I've got a new one here - Apparently the screws dont tighten enough - is there anywhere I can get the requisite partially threaded bolts?
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5SGTE
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Re: Looking for source of issue (2nd gen 3s-gte)...
2016/05/21 19:45:43
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What do you mean by 'fixed the maf'?
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antmcbane
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Re: Looking for source of issue (2nd gen 3s-gte)...
2016/05/21 19:49:21
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Car cut out at a stop sign. Got it home - found ecu light wasn't coming on, disconnected afm, found the car would start. Pulled it out & disassembled, found one of the connections had shorted, resoldered, sprayed with contact cleaner (as it was a bit dirty) and all connections were then within bgb spec and the car ran quite a bit cleaner better than it did before.
Don't worry - nothing spicy.
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Carmikey
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As 5SGTE is stating.. MAF is different to an AFM. i thought it was strange also u mentioned maf on a early 3sgte.
Sent from my SM-G800Y using Tapatalk
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track_mr2
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MAF and AFM are basically the same things. MAP sensors are different and what the Gen3's use.
You were saying your getting oil in the cylinders, have you pulled the dipstick out and checked that oil isn't diluted with petrol making it really thin? If you car over fuels to a huge extent it can bore wash the cylinders and put raw fuel into the oil.
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antmcbane
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Thanks for having my back on the MAF/AFM thing... didn't mean to be confusing so sorry about that :P
Inside the cylinder itself is fine, it's just in the spark plug wells that have oil. The actual plastic tubes that go inside the well are a bit wet on the first and second cylinder but completely dry in 3 & 4. I'm not convinced 100% that it's the problem but I've given it a clean and used a bit of contact cleaner to clean it out and have the valve cover gasket kit here, so I'll update once I've installed that.
Oil is a bit dark honestly but is getting close to needing replacing anyway (Done about 4500km), I've seen much worse on engines that are working 100% fine.
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track_mr2
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Oh its just oil in the plug tubes, yeah that wont be your problem then. What color where the tips of your spark plugs? Were they all the same color when next to each other. Take them out and send a pic of them. How many km's have you done on your sparks plugs and rest of ignition system? First thing I did when I got my MR2 was to change plugs, leads, rotor button, rotor cap, then later I ended up having to change ignitor module and coil. Having a strong ignition in a MR2 turbo solves a lot of issues. If you change leads get magnacore, they are the best! When my ignitor module was on the way out I had big problems with over fueling, took me ages to work out what was wrong but once I swapped it, it was perfect.
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