greenwood

I had a fine running rb20 in my car and I daily drove it and road tripped it a lot. I took it out because compression was getting low.

I swapped all the sensors over to the new engine that I put in, oem bottome end arp head studs top end.

The moon shape on the exhaust cam to guide the CAS in was broken. so I had to eyeball/guess where to position the cas. After doing this, I was able to get the engine started, ran fine, kinda rough, but timing wasn't set. No weird smoke or anything. Afr's showed lean but my afr's have always showed lean at idle.

Now here comes the problem. I went to do the timing, and messed with the TPS to adjust idle. yes, i know this is more than likely a big no no. I timed the car to 15 degrees but that was at 800rpm and not 650+/- 50 like suggested. Anyway, the tps was moved all the way to the right. I drove it around the block and it drove fine, still not timed right though, I could feel it not firing totally fine, although it did ride relatively smooth.

since having the new engine in i've only hit maybe 2 pounds of boost. When the engine was first running vacuum at idle was 18, now it is 15 after timing it. I went to take it out again last night to adjust the idle to 650 and re-time it. Well, With the car off, I adjusted the tps back to center position thinking this would also smooth it out. As soon as the car fired up it was at 2000 rpm and stayed there, I backed it out of my driveway, and went to drive it down the street. 5 feet after take off it just dies out.

The car is still getting fuel and tries to turn over, I adjusted the tps back, will still not fire, adjusted the CAS around same issue. unplugged maf, tps, reset ecu via unplugging and replugging in battery many times, same issue, turns over, is getting fuel it just seems like timing is off.

the weird thing is when i had the car running previously at idle i could move the cas to the furthest reaches of its adjustments both ways, and the idle and running sound of the engine would change but it would still run fine and start, when i did it after this mishap, nothing.

This happened last night, today I tried to start, no luck (thinking it might be flooded and overnight cleared it up) looked at a plug on number 1 and it was rather white but not super burnt up or anything.

questions. anyone know the problem or can give suggestions?

I'm thinking put new plugs in, adjust the tps to center, swap my 300zx maf for my spare, fire the car up, adjust idle (where do i do that, is that on the orange plug on the back of the manifold, the iacv? I see that but it doesnt seem to have an adjustment like people say, or should i adjust via the ecu straight slot turn dial?)

How does one reset the tps? where should it be.

thanks all I appreciate it a lot.

Yes I have searched my ass off and have been running a rb car for 2.5 years.

hooknbook240sx

put fresh cheap copper plugs in gap them accordingly say .032-.035 , use that spare 300zx maf make sure its in good working condition. also check your grounds for coil packs and even you're alternator wiring. Put tps back to where it was. Their should be a idle adjustment screw on the IACV on the stock intake manifold its located on the back toward the firewall of the intake mani. hope this helps- hooknbook.

greenwood

thank you I will be taking these steps tomorrow. Have a great weekend.

greenwood

I put in new plugs, the car is getting spark.

I have adjusted the cas and tps, car has good fuel pressure as well.

I have tried starting without tps and maf plugged in, still no luck.

I'm going to swap maf's and tps's and see if this helps.

Also I'm going to make sure that the timing belt did not jump a tooth.

thank you

greenwood

Faulty CAS even though she had spark was the fix