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Discussion Starter · #1 ·
Ok so I rebuilt my 4zd1 from head up got head machined new valves and all when I get it all back together I realize I put fuel pump pushrod upside down so got a electric fuel pump and bypassed it now I have it somewhat running but it idles high and if I bring it down it dies when setting timing it was right according to light but backfired alot it runs better nowhere close to marks there is probably a few vacuume leaks would this change so much after a short drive it will idle at like 2.3k ish
 
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