tougeracing

oh its fuel injected.^^

I know this is an old thread. But it the issue is similar to mine. I have 75' 280z, it hesistates on acceleration until about 2-3k and it will accelerate normal again. I'm getting backfire in the intake. It all started happening after I installed an ebay cai, and msa headers. The header bung is closed, but the EGR is still open, not sure if this will cause these kind of symptoms. Things changed: fuel lines,vacuum lines, regrounded wires, intake couplers, spark plugs and wire. The car has ran perfectly fine before the installs. Any help is appreciated.

check battery also. thats what happen to mine.

I replaced all the vacuums, and timing should be dead on since it was running completley fine before the headers and intakes went on. i guess i can double check things. But does not plugging the EGR cause hesitation when applying initial throttle? thanks.

are you guys talkin about the hole that the EGR sits above on? my 280z has been popping like crazy after a headers and intake install. I plugged the bung on the header, but the EGR and the diaphragm is still open. Can I take off the EGR and block the hole with an aluminum plate? or will the off readings of the EGR blocked still cause the issue (hiccuping, popping in the intake, hesistation)? 1975 280z Been tryin to get this thing running smooth for a while. Any help is appreciated.