Rough idle and engine noise after turbo install
#1
Rough idle and engine noise after turbo install
Hey guys so i recently installed my turbo and now my car is acting weird! Im using an older flyin miata manifold and downpipe and an older fm2 intercooler im also running 1.8 injectors and a 12:1 vortech fmu and msd the turbo is a garrett t25
What happens is that when i turn on the car the rpms go down and the car strugles to stay on the rpms bounce up and down. Also it makes a very loud noise i thought it was my exhaust manifold gasket so i replaced it again and that wasnt it. I called flying miata and i was told to check my cylinders by unpluging the plugs each one by one and the plug 4 didnt make a difference o the cars behavior when unplugged there was also a small amount of oil on the plug so i redid my valve cover gasket and cleaned it all up. I thought maybe the wire was bad so i borrowed my cusins wire from his miata and that didnt make a difference. I swaped the plugs too and that made no difference them i checked the wire with a light and it light up meaning its working ok. Im out of ideas as to what can be wrong can some one please help????
What happens is that when i turn on the car the rpms go down and the car strugles to stay on the rpms bounce up and down. Also it makes a very loud noise i thought it was my exhaust manifold gasket so i replaced it again and that wasnt it. I called flying miata and i was told to check my cylinders by unpluging the plugs each one by one and the plug 4 didnt make a difference o the cars behavior when unplugged there was also a small amount of oil on the plug so i redid my valve cover gasket and cleaned it all up. I thought maybe the wire was bad so i borrowed my cusins wire from his miata and that didnt make a difference. I swaped the plugs too and that made no difference them i checked the wire with a light and it light up meaning its working ok. Im out of ideas as to what can be wrong can some one please help????
#6
I just checked my plugs and they are all at 0.045 inches and my boost gauge bounces between 10-15 vac when its strugling to stay on then at times will idle fine untill i hit the gas all the plugs looked the same the one from cyl 4 didnt look any different im going o run. Compression test first thing tomorow morning
#7
Http://youtu.be/XMqO_XpdeUw
Http://youtu.be/2MCoVQgi7_Y
Its worth mentioning that i had another turbo manifold and downpipe before this started happening and i upgraded to this setup i have now with my other turbo it wasnt doing this but i upgraded because my turbo was going bad and i found this kit on cl so decided to upgrade everything. Only thing different is i added 1.8 injectors and used a different modified 02 sensor (longer in order to reach) and added intercooler but the car was running ok before this. It wasnt loud and didnt idle like this just the turbo was busted.
Http://youtu.be/2MCoVQgi7_Y
Its worth mentioning that i had another turbo manifold and downpipe before this started happening and i upgraded to this setup i have now with my other turbo it wasnt doing this but i upgraded because my turbo was going bad and i found this kit on cl so decided to upgrade everything. Only thing different is i added 1.8 injectors and used a different modified 02 sensor (longer in order to reach) and added intercooler but the car was running ok before this. It wasnt loud and didnt idle like this just the turbo was busted.
Last edited by curly; 08-17-2012 at 08:40 PM.
#18
The weird thing is it was running fine with my last turbo not much is different just manifold downpipe turbo intercooler o2 sensor. After i replaced all those parts it started acting up before i even ran it once then i changed the injectors and it made no difference. So idk gow i could have nuked it...
I dont understand how i could have nuked it if it was running turbo before without theese problems and all i changed was manifold downpipe turbo added intercooler made the o2 sensor longer inorder to reach and i turned it on and it was acting like this so i changed my injectors and it made no difference so i changed exhaust manifold gasket again and redid my valve cover gaskets but it was running fine before its just i had a turbo with shaft play
I dont understand how i could have nuked it if it was running turbo before without theese problems and all i changed was manifold downpipe turbo added intercooler made the o2 sensor longer inorder to reach and i turned it on and it was acting like this so i changed my injectors and it made no difference so i changed exhaust manifold gasket again and redid my valve cover gaskets but it was running fine before its just i had a turbo with shaft play
Last edited by curly; 08-17-2012 at 08:41 PM.
#20
It should be running alot better now but its running worse then before at idle it ahould be normal tho even with the ammount of fuel its getting because its nt under boost right?? I ran it alittle just aroud my block and i got about 4 psi boost and whenever i left it in gear and let the car keep going without giving gas it would quiet down and as soon as i gave it gas it would be super loud again