Hoopster 0 2 Cars Posted February 9, 2007 Hi, My 205 S16 is doing my head in! im hoping someone on here might be able to shine some light on my problem. Right this is what its doing:- Its got a real poor tickover, and on low revs or light throttle its got a real bad missfire, its popping and banging, when you get it above about 3k the car will pull like a train without any problems at it, to be honest its really flying, but the minute you let the revs drop it starts missing like mad again. Things ive already tried checked the four coil packs by replacing them one by one with a good spare that i have. fitted four new plugs when fitting the new s16 inlet, a cleaned the throttle body and breathers. fitted a new ecu temp sensor(blue one) When i changed the plugs earlia today, they were very black a sooted, which suggests the car is over fueling, and it is drinking alot of fuel, and its smelling of fuel when driving it. the engine is standard, but think there is a performance chip of some descriprion fitted to the ecu. So any suggestions? any help would be appreciated! Cheers Dave Share this post Link to post Share on other sites
Mikey S 29 1 Cars Posted February 9, 2007 (edited) have you checked the lambda sensor? if its stuck it will richen the mixture right up, hence the sooted plugs. you need to back probe the connector. it will have 4 wires, 2 are for the heating element inside the sensor itsself and the other 2 are signal wires. you need to back probe these 2. you should see the voltage switching somewhere between 0.8 and 1.2 of a volt. edit, was your gutmann featured in pgti a while back? if it was, its abit Edited February 9, 2007 by pugger Share this post Link to post Share on other sites
Miles 331 1 Cars Posted February 9, 2007 The blue sensor isn't the temp one, It's the brown one as most later engines, I'd change all 4 coils, I've had more than one break done before Share this post Link to post Share on other sites
Hoopster 0 2 Cars Posted February 9, 2007 Hi Miles, Yes it was my gutmann in Pgti, cheers! Right, prob not a good thing but it doesn't have a lambda sensor, but it never has, and it was running fine for a long time before this started happening, to be honest i bought the car with the motor already fitted as a fix er up er! which has suited me fine up to now, as it was plenty quick enough to keep me entertained on my way to work, plus its cheaper to run and saves wear and tear on the Gutmann! the engine has two temp sensors, a blue one and a green one, my local motor factors that ordered it in for me assured me it was the ecu temp sensor that was blue, and the green one was for the guage! there a nightmare to get too aswell!!! As to coil packs, i wonder if a can get em checked out, don't really want to spank £120 on four new ones to find im wrong!lol Appreciate your help. Dave Share this post Link to post Share on other sites
Miles 331 1 Cars Posted February 10, 2007 It might be the green one then, I know on my V6 it's the brown one as just to confuse things they keep changing the colour, It's blue on the 205 GTi's and Mi16 engine's. Hardest thing with the coil pack's is sometime's there fine and sometimes not, On a old 405 of mine when under warranty the garage could never get it to misfire so I got a complete package of ECU, Coil's and amps Share this post Link to post Share on other sites
Hoopster 0 2 Cars Posted February 10, 2007 Right ive sorted it!!!!!! Thought id have another look today to try and track down the problem, and started removing parts one by one and checking them, when i removed the ecu and vac pipe for the map sensor, i noticed the pipe was perrished, five mins later and one new piece of pipe and she's running like a dream again!! So simple, yet its fried my brain for over a week!! Oh well you live and learn! Cheers Dave Share this post Link to post Share on other sites
