9Arebuild 10 Posted May 17, 2018 Hi guys. Im after rebuilding a 9A and its going fairly well. But… Takes several attempts to start from cold, eventually settles into an idle at about 1k RPM. Whilst driving the car it seems to pull very cleanly once it goes above 2000 rpm. The idle is a little lumpy to be honest, and if I blip the throttle it generally tends to misfire a little until it gets to approximately 1700 rpm. The idle stabiliser valve doesn’t seem to be doing anything, if I disconnect it the engine runs as before. Hot starting seems to be impossible though. It is quite difficult to get the ignition timing set at 6° as the idle seems to be moving around considerably. I cant seem to find any pinout diagram for the 9A engine, so that would be a massive help to ensure that everything is connected correctly or if something else and missing. I would be greatly appreciative of any assistance. Quote Share this post Link to post Share on other sites
VEEDUBBED 0 Posted May 18, 2018 Hi mate, welcome aboard. Right, I'll make a few suggestions to try and see if we can work out what's wrong. Cam timing spot on? It's surprisingly easy to get the cam/crank timing off by a tooth, seeing as you recently rebuilt the engine I'd double check it. Fuel pressure, sounds like a low fuel pressure issue, did you change the fuel filter? How many miles on the injectors? Have you checked the actual fuel pressure with an accurate gauge? Ignition side, plugs changed too? Leads ok? Have you checked the airflow flap isn't gunked up or sticking? The idle valve might actually be seized, I've change a few over the years, especially the 2.0 9A engine ones.. Have a look at that lot then report back. Cheers. Quote Share this post Link to post Share on other sites
9Arebuild 10 Posted May 18, 2018 Hi VEEDUBBED, thanks for you reply. OK, new leads, plugs, dizzy cap and rotor. New filter. New lambda sensor. I cleaned the injectors and the spray pattern looked normal for CIS. Air flap in meatering head moving freely, no muck around it. I will double check the valve timing but I always use a dial indicator to find TDC instead of the marks. I will retest the fuel pressure and come back with results... Quote Share this post Link to post Share on other sites
