Rb20det tought to start, low vacuum at idle?

[Empire087]

So im a derp and missed this forum and kept trying to post in the tech section of the 240sx portion... Anyways after dealing with a nightmare of wiring my motor into my chassis with no plugs(no donor engine harness) i finally got it running. Now heres the thing on a brand new sunpro style line boost gauge im only pulling 17" of vacuum at idle, this seems low for a healthy engine. now the other thing is my motor takes a bit of cranking to start. Could this be related to my low vacuum? Ive been checking for leaks but really found nothing.

Also does anyone have a list of what each of the body harness wires go to on the engine harness?

Thanks for the help!

[Yellow4g63]

could just be the start signal for the ecu. If it's not at the ecu from the dash plug it will take a while for it to kick over. Are you sure your sunpro gauge isn't off?

[Syrus33]

hey, my rb20det runs the same vacuum at idle and it runs perfect. i usually idle around 18-20 cruising is 10-12 and coasting off throttle is about 24-25 vacuum.