Zeldoz Posted November 18, 2013 Share Posted November 18, 2013 Basically, since doing all the mods to my car when i come to around 2,000rpm in ANY gear. It feels lumpy or its missing.. I cant really describe it. Imagine your driving down a DEAD flat road, and all of sudden if feels like you hit a small bump in the road.. That's the only way i can describe it. I have changed my HT leads to blue magnicore ones, problem still persists.. Do you think its boost related? As i can hit fuel easily, but im plodding to and from work currently until i port my wastegate, fit my HKS actuator and my boost controller. Is this potentially something bad with the engine? It's done 83,000km's and was bog standard until i modified it. Below is the specs; HKS DecatHKS Hi Power ExhaustFMICAir Filter RelocationBaileys dump valveStandard ActuatorCT9 TurboStandard Mani Or im worrying its to do with fueling, as i have so much air, and not enough fuel potenially? Just dont want to risk anything that could damage the engine. Sorry if it seems hard to diagnose, it's a weird problem to describe. Just juddery around the 2k rpm area.. then it's fine! Quote Link to post Share on other sites
Zeldoz Posted November 18, 2013 Author Share Posted November 18, 2013 Just to add, the engine sounds healthy, not dog rough. All you can hear is the fuel injectors tapping away which im lead to believe it common? Quote Link to post Share on other sites
Ryan_EP82 GT Posted November 18, 2013 Share Posted November 18, 2013 (edited) The ecu will control the fuelling as long as your boosting below .85bar/12.5psi so don't worry about the air/fuel mixture at these levels or below.Ive no idea why it would run lumpy at 2k but that's my 2ps worth on the fuelling bud. Theres probably enough Starlet specialists around you anyway to get it sorted Edited November 18, 2013 by Ryan_EP82 GT Quote Link to post Share on other sites
Zeldoz Posted November 18, 2013 Author Share Posted November 18, 2013 The ecu will control the fuelling as long as your boosting below .85bar/12.5psi so don't worry about the air/fuel mixture at these levels or below. Ive no idea why it would run lumpy at 2k but that's my 2ps worth on the fuelling bud. Theres probably enough Starlet specialists around you anyway to get it sorted Ok that's good to know. It's really odd. It's not noticeable if your a passenger. But as im driving i can definately notice it! Quote Link to post Share on other sites
TurboTobz Posted November 18, 2013 Share Posted November 18, 2013 Sounds like hesitation rather than a miss, does it sound like a scooby when it does it or not Quote Link to post Share on other sites
Zeldoz Posted November 18, 2013 Author Share Posted November 18, 2013 Sounds like hesitation rather than a miss, does it sound like a scooby when it does it or not Doesn't sound any different in the note of the engine or the exhaust note... It's really got me puzzled! I'm not that bad with diagnosing car issues, but this one is confusing me! Quote Link to post Share on other sites
Aamir Posted November 18, 2013 Share Posted November 18, 2013 Try change the spark plugs Quote Link to post Share on other sites
Zeldoz Posted November 18, 2013 Author Share Posted November 18, 2013 Try change the spark plugs This was next on my hit list. I have no history of how new/old they are. When i painted my rocker, i peered in with a torch and they actually look clean, but that's the top i obviously didn't remove! Aamir, link me Iddys plugs! I know you love a ID-Workz linking! Quote Link to post Share on other sites
Jamie_VF22 Posted November 18, 2013 Share Posted November 18, 2013 (edited) Was going to say change the spark plugs Get some ngk iridium heat range 7 in there mate Edited November 18, 2013 by Jamie_VF22 Quote Link to post Share on other sites
string Posted November 18, 2013 Share Posted November 18, 2013 Spark plugs and dizzy cap/rotor arm swap. Deffo will sort it Quote Link to post Share on other sites
Zeldoz Posted November 18, 2013 Author Share Posted November 18, 2013 Was going to say change the spark plugs Get some ngk iridium heat range 7 in there mateI'll give them a go! Quote Link to post Share on other sites
Zeldoz Posted November 18, 2013 Author Share Posted November 18, 2013 Spark plugs and dizzy cap/rotor arm swap. Deffo will sort itWill it be bad to keep driving until payday? Can do without spending out currently! Quote Link to post Share on other sites
sosolid Posted November 26, 2013 Share Posted November 26, 2013 Mate u got the same prob as me. I changed my plugs nd ht leads still same. I hve noticed oil on 2 of the ugs so gonna chNge the gaskets in the rocker cover to see. It started put of the blue. I use heat range 6 iridium nd running stanadrd boost fmic decat nd aftermarket ecu. So will chNge ug seals nd see if that helps. Quote Link to post Share on other sites
Zeldoz Posted November 26, 2013 Author Share Posted November 26, 2013 Mate u got the same prob as me. I changed my plugs nd ht leads still same. I hve noticed oil on 2 of the ugs so gonna chNge the gaskets in the rocker cover to see. It started put of the blue. I use heat range 6 iridium nd running stanadrd boost fmic decat nd aftermarket ecu. So will chNge ug seals nd see if that helps. Let me know, my problem is still here, would be cool to know the solution. I was going to change plugs next month. Quote Link to post Share on other sites
sosolid Posted November 28, 2013 Share Posted November 28, 2013 check if there is oil around the threads of the spark plugs mate. Quote Link to post Share on other sites
sosolid Posted November 29, 2013 Share Posted November 29, 2013 have you sorted your problem out mate? Quote Link to post Share on other sites
Zeldoz Posted November 29, 2013 Author Share Posted November 29, 2013 I haven't had a look! You sorted yours? Quote Link to post Share on other sites
sosolid Posted November 30, 2013 Share Posted November 30, 2013 not yet. got my spark plugs gaskets and rocker cover gasket. gonna change dem nd see. Quote Link to post Share on other sites
The Toffinator Posted November 30, 2013 Share Posted November 30, 2013 Worth popping the dizzy cap off, and all the leads giving everything a good clean up.Main thing to do with the cars running and nobody ever checks these things lolIf that fails spark plugs mate Quote Link to post Share on other sites
sosolid Posted December 1, 2013 Share Posted December 1, 2013 ok mate will do dat Quote Link to post Share on other sites
sosolid Posted December 6, 2013 Share Posted December 6, 2013 ive cleaned the distribtuor and rotar arm, still same. also when idling the revs change between 0.3rpm and 1.2rpm. it does stay at one level. what ese could dis be. ????????? Quote Link to post Share on other sites
sosolid Posted December 6, 2013 Share Posted December 6, 2013 also da exhaust noise is not a constant rumble but a pop now and again which aint normal. caused by unconsistant rpm change at idle. Quote Link to post Share on other sites
Mikeyallgood85 Posted December 6, 2013 Share Posted December 6, 2013 also da exhaust noise is not a constant rumble but a pop now and again which aint normal. caused by unconsistant rpm change at idle. have you checked for boost leaks? Is the ignition timing correct? Bov could be leaking! Quote Link to post Share on other sites
sosolid Posted December 6, 2013 Share Posted December 6, 2013 No boost leaks . Bov is stanard one. How do u check ignition timing. Does dis wen engine is warm. Wen cold its fine Quote Link to post Share on other sites
Mikeyallgood85 Posted December 6, 2013 Share Posted December 6, 2013 No boost leaks . Bov is stanard one. How do u check ignition timing. Does dis wen engine is warm. Wen cold its fine you need a timing light to time the ignition timing properly it's 5mins for a mechanic to do! Also have you done a compression test on the cylinders to rule internal problems? Also try removing the standard bov and blocking the holes up to eliminate that being the problem unlikely it's that but you should check it to be sure. Hope you get it sorted bud Quote Link to post Share on other sites
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