Rb20det silver top idleing rough at cold and hard to start

[Empire087]

So ive been slowly getting my rb running a little better every day. So heres the breakdown:
Car will start, but it takes gas to get it to start when cold. It will turn over and turn over and try and start a few times. Battery is brand new 800cca.
-Car once started will run rough, and it may die. However if it idles for more than 10 seconds or so it will usually stay running.
-Car will make it all the way to warm and idle up.
-if i where to shut it off i may have to apply gas to start it again.
-for whatever reason my stock tach wont even work, and my aftermarket tach wont work. I even wired in a 10k resistor. Not sure why.

I replaced the coolant temp sensor made no difference, pretty sure i wired everything correctly. If anyone can give me a hand id greatly appreciate it!

Thanks,
Dakota

[Sileighty_85]

Dirty/Bad MAFS, Boost or Vac leaks, Old/Bad spark plugs.

[Empire087]

Dirty/Bad MAFS, Boost or Vac leaks, Old/Bad spark plugs.

Thanks so much on those!!!! replaced the spark plugs and cleaned the maf and it fired to life like right away, despite not having the maf hooked up lol. I was leaning towards spark plugs before but you confirmed it for me.

Again thanks a ton!

[Sileighty_85]

Thanks so much on those!!!! replaced the spark plugs and cleaned the maf and it fired to life like right away, despite not having the maf hooked up lol. I was leaning towards spark plugs before but you confirmed it for me.

Again thanks a ton!


Nice, No prob.

just make sure you gap the plugs properly, (they are not pre gaped)

Cant remember for RB20, so search around and see what ppl gap theirs to.

[Empire087]

Im running a bkr7e, which im pretty sure came pre gapped at .032. I double checked all of them and made sure they where the same. I figure so long as it doesnt blow out under boost ill call it good. If not ill just re gap them to what everyone runs those plugs at .028.