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| misfires pops an rocks engine http://www.gt4dc.co.uk/forum/viewtopic.php?f=13&t=4895 |
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| Author: | Mr Burt [ Sun May 01, 2011 9:04 am ] |
| Post subject: | misfires pops an rocks engine |
just had hybrid turbo an front mount fitted when i put the engine back in a month ago but now it has this problem. its fine everywhere in the rpm range but it starts doing this when im backing off the throttle to maintain a speed. an at very light part throttle it does it aswel. ive changed the plugs an i noticed there is a knick in one of the leads but i carnt see it being that. i carnt hear any air leaks. any ideas? thanks.[/list] |
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| Author: | Sirius [ Sun May 01, 2011 8:33 pm ] |
| Post subject: | |
Take a look at the inside of the distributor cap and rotor arm. I had a fault that started much like this and ended up with a wrecked rotor arm. |
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| Author: | Nibbles [ Sun May 01, 2011 9:40 pm ] |
| Post subject: | |
If it's a 185 then look for an air leak, especially atmos. dump valve. Misfires due to poor ignition are normally worse at higher boost. Also worth a look inside the dizzy cap to check the rotor arm is tight. |
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| Author: | MrDB [ Sun May 01, 2011 9:43 pm ] |
| Post subject: | |
Prob compressor surge flutter. Is it a 185? It's more likely if it is... also dodgy bov can cause this.... |
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| Author: | Mr Burt [ Mon May 02, 2011 8:29 pm ] |
| Post subject: | |
yeh st185. no dump vavle. running 12psi. will check rotor arm tomorrow. |
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