Sr20det red top problem!!

[ll_EvOluTIoN]

So just did my swap and I'm having an idle problem. It seems to be idling around 1000rpm(tach nonop) then it seems to cut out for a sec. I was checking the injector pulse with test light and when the engine cuts out the injectors stop pulsing.

I checked tps adjustment an it's at .4v. I'm getting spark at all plugs. New spark plugs n gas. New stock injectors spray great. I switched between 3 ignitor chips n same prob. Switched in known good ecu. Same prob.

Any ideas of what it could be?

[Sileighty_85]

check ECU for Codes
If you dont know how, Search on how to do it

[Kingtal0n]

I am the last person to suggest a maf problem but from the sounds of it (replaced ecu, replaced igniter, missing injector pulse suddenly...) it sounds like a maf issue. maybe the maf plug is loose or vibrating a bit? CAS could also be culprit as you did not mention whether spark cuts out or not. if pulse and spark dissapear then CAS/Wiring/ECU related. if just pulse then MAF probable. Because the plugs will fire as the engine rotates regardless of maf signal (right???!)

[Vatche]

i would also reccomend checking the wiring on your maf, loose wiring or bad solders can cause that

[ll_EvOluTIoN]

Thanks guys. Harness is brand new I'll check to make sure I'm getting correct voltage. Oh and timing is dead on lined up just in case u guys were wondering.

[ll_EvOluTIoN]

Ran codes n got 55. Checked tps it's .48v-3.8v wot. Maf is .8v key on engine off. Don't hap rpm signal do not sure if this helps but 2.8v when its idling. 3.7v at wot engine on. My vacuum/boost guage fluctuates from 4hg to 6hg wile idle goes up n down. When I rev it boost goes to about 5-6psi. So I dont think it has a boost leak.

[ll_EvOluTIoN]

Bump any help?

[ll_EvOluTIoN]

So the injectors are cutting out. I tried a new tps n it fixed the idle for 5 min n did the same. So put a new maf and the problem goes away untill I hit the throttle. Then idles bad again. Now today no matter what I do it idles bad. Here's what I got.

YouTube - Sr20det problem (http://www.youtube.com/watch?v=GXfN9IlsMQs&feature=youtube_gdata_player)