GuiltySoul

iTrader: (7)

So I took apart my upper intake Mani to paint it. After that I reinstall everything in its proper place I went to start it and it crank and cranked, started but died as soon as it did. Whens I went to the throttle body it was making a humming noise like a bad relay sound. When I touch the throttle linkage it goes away and happens when key is on engine off.

Do I need a new TB? Please help me out guys thanx

hIGGI

iTrader: (7)

for start and die check your AFM plug

humming noise is most likely BAC and there is nothing wrong with it...

satch

iTrader: (1)

If the unplugging of the BAC stopped the hummimg then you know the source.

misterstyx69

iTrader: (142)

Duh!..Its a Thirteen BEE!
(Sorry,I had to say it..I just had to!!!!!)
..Seriously,Higgi and Satch got a grip in this one..BAC.

GuiltySoul

iTrader: (7)

Ok thanx guys good thing I got another bac ill swap em out when I get home

satch

iTrader: (1)

It's normal for the BAC to hum so replacing it is not necessarily a fix.

GuiltySoul

iTrader: (7)

Could it be the tps? And is there a way to test the bac?

satch

iTrader: (1)

Again, if the BAC were humming/vibrating and you unplugged its electrical connection and the noise stopped then you know the source of the noise.

GuiltySoul

iTrader: (7)

Ok I swaped out the bac and ofcourse nothing when I disconnected the tps it stopped humming could it be the tps or this means nothing??

satch

iTrader: (1)

The TPS controls both the Relief and Switching solenoids. The Relief solenoid has a circular blue mark on it. It has a plug w/two wires. Unplug this plug when the humming occurs. If the humming still occurs then unplug the Switching solenoid plug.

pfsantos

iTrader: (1)

Once again...humming is normal. Unplugged afm or maybe hose unattached...check one that connects from the bottom to snorkel between air box and tb. Dont readjust tps and it was mentioned not to swap bac. Focus on stuff u undid or disconnected.

jackhild59

iTrader: (7)

And the humming isn't keeping the car from starting.

The no start is normal, if you have a major vacuum leak.

GuiltySoul

iTrader: (7)

Ok so the humming means nothing but it still wont run. I checked all vac lines even underneath the Mani and they're all good, deflooded it, changed spark plugs and still nothing. Sometimes if I crank it long enough it starts, revs to 4000 then dies.

Any ideas guys?

hIGGI

iTrader: (7)

have you checked your AFM plug (if its properly connected?)

satch

iTrader: (1)

Have you tried jumpering the fuel check connector?

GuiltySoul

iTrader: (7)

Afm plug is fine

Satch; how would I do that?

satch

iTrader: (1)

Under the dash and just to the right of the steering column is a Black and Yellow relay/plug called the Circuit Opening Relay. Has two rows of wires. Bottom row has two wires, one Black and the other Brown. Jumper these two wires together. W/key to on the Blue wire in the top row far right position should have voltage. This wire powers the fuel pump

pfsantos

iTrader: (1)

^ or you can just jumper the yellow connector under the hood near the intake with ignition on.

Pictures of Fuel pump connector, Circuit opening relay (the one satch mentions), etc.:

https://www.rx7club.com/2nd-generati...erence-671004/