TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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I have the 9th injector on my 87 GTA, and it has always fired up within 1 second of turning the key, then dropped to a steady idle.
Lately, it has fired off, stumbled and died, on a cold engine. Unless I blip the throttle.
It seems as if the cold start injector isn't doing its start job, as the only time it does that, is on cold starts. Once it has run, if I kill it & try to restart? It'll fire right off & drop to a smooth idle.
Could the cold start injector have gone bad somehow? Clogged? Dead signal? Fried?
