idling issue and new tach

well here is a video of me trying to drive from a friends house to my boat...



as you can see it is having idling return issues. no that was not me myself stalling lol, had to pop the clutch cause car was coming! I tried installing a new IAC but same issue occurs so put original one on. Also, there is a loud whistle/screach coming from the engine bay, sounds like coming from intake. Mike and I were pretty thorough with vacuums while doing the rebuild so idk. Any ideas??

and i tried installing that new tach, however its not working. red wire to ignition wire. black to ground. white to lights. green to ignition coil. It lights up but does not read RPMs.

and also this can serve as a quick in-car sound clip

sounds like a vac leak. Hmmm I have a fog machine that can be used to find one

ok when can you come over lol

this weekend. Probly saturday

im free after 3 saturday

K

Check all wires and sensors for wire exposure (bare wires) or the touching of bare wires. Could be shorting out causing computer to get misread and shut down the motor. This happened to me on I-81 with my 95 gt. I discovered two wires going to senor plug were bare and touching. Had to do roadside rigging and electrical taped wires seperatley. Started right up. Immediately repaired the wires once I arrived home. No problem since. Hope this helps ya out

RTW0223 wrote: Also, there is a loud whistle/screach coming from the engine bay, sounds like coming from intake. Mike and I were pretty thorough with vacuums while doing the rebuild so idk. Any ideas??

Funny how a vacuum leak can sound like a screech. When I replaced my first 5.0L I thought a had a bad bearing or something. For me it was a vacuum line under the driver side of the upper plenum. It became disconnected during installation of the upper. It is hard to see under there. It might be useful to use a mirror. Heres a Picture

What TB do you have?

bbk edelbrock 70 mm TB

and i went out to spencers today and bought a fog machine so taht i can test for the vacuum leaks!

also..got my tach to work. the red wire was not gettting any voltage.

Known issue that bbk tb whistle bad...and their tps sensor gives bad readings. I used to have one...

i cant wait to put my tach in and i forgot to text you but he didnt have one anyways

tps is outputting .98 volts.

and its odd, because ive had this TB for about a year and never heard a whistle like this before.... ill be smoke testing the car tomorrow

RTW0223 wrote:tps is outputting .98 volts.

and its odd, because ive had this TB for about a year and never heard a whistle like this before.... ill be smoke testing the car tomorrow

different mass air, more camshaft, better flowing heads = more air intake / velocity into the air intake tract, sharp edges and or rough castings in the intake tract can also cause such as air flows over and or around such, when I had a bbk edelbrock on mine with the ported cobra intake, it was twice as loud as yours Ryan, I switched to an Acufab and rpm 2 intake and no more whistle

Also, Idk if this has anything to do with the way the 5.0 idles but when the IAC is disconected it was no effect on idle, Reconect same thing. I adjust the throttle stop to get it to idle slightly better. When first starting the motor will rev and shut down. Start again same thing. If you give it a lill throttle it will do one of two things. Idle hunt. From 500 to about 1200 rpm or stay at about 800 rpm and act like its missfiring. IE rough idle. Every now and then itll somewhat smooth out but go back to rough idle.