new install; vacuum issues?
#1
new install; vacuum issues?
Installed a greddy turbo and other hardware this past weekend (see stuff in my sig for details of my setup). Installation went smoothly, but my knuckles would say otherwise. I had an idle issue at first startup, but reason was apparant in a vacuum leak between the BOV and IM (loose air hose). The car then idled fine. I have driven the car a couple times this week and have been careful not to boost (I lied, boosted twice to 4psi).
What are your thoughts on this? --> When letting off the gas (blipping gas in the driveway, or stopping in neutral for a light), the RPMs will fall but will stay around 1700-2200 RPM and fall a few hundred RPM then raise back, then fall again, and repeats this cycle a few times before stabilizing. It eventually falls back and idles at 900RPM. I'm thinking I still have a vacuum leak somewhere. Listening closely to all the airline tubing joints and connections, I hear a hiss from the MBC. Is that a normal characteristic of a MBC? Any other ideas?
I have an EMB ready to go, along with autotune and 02 clamp, and 310cc injectors, that I will install after I fix this problem.
What are your thoughts on this? --> When letting off the gas (blipping gas in the driveway, or stopping in neutral for a light), the RPMs will fall but will stay around 1700-2200 RPM and fall a few hundred RPM then raise back, then fall again, and repeats this cycle a few times before stabilizing. It eventually falls back and idles at 900RPM. I'm thinking I still have a vacuum leak somewhere. Listening closely to all the airline tubing joints and connections, I hear a hiss from the MBC. Is that a normal characteristic of a MBC? Any other ideas?
I have an EMB ready to go, along with autotune and 02 clamp, and 310cc injectors, that I will install after I fix this problem.
#7
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thats what happened to my last turbo car running atmospheric bov with a maf.
try unhooking your bov and blocking its vac line... just for a second.
if it is the problem, and it happens alot you will go through a set of spark plugs in a week from running so rich in those conditions.
try unhooking your bov and blocking its vac line... just for a second.
if it is the problem, and it happens alot you will go through a set of spark plugs in a week from running so rich in those conditions.
#8
thats what happened to my last turbo car running atmospheric bov with a maf.
try unhooking your bov and blocking its vac line... just for a second.
if it is the problem, and it happens alot you will go through a set of spark plugs in a week from running so rich in those conditions.
try unhooking your bov and blocking its vac line... just for a second.
if it is the problem, and it happens alot you will go through a set of spark plugs in a week from running so rich in those conditions.
#18
I'm a newbie to engine management, having only used a bandaid voodoo box for my old FM turbo. I'd like to just get the EMB sorted in the car first (and learn the greddy software) before moving on to a GM 3 bar sensor and wideband 02 sensor (both of which I already have). The EMB is ready to go (including ignition/injector harness), I soldered the connections in the ECU for easy PNP to the factory wiring harness.
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