Car: 79 TR7 dhc federal duel Zeniths.
Problem: My car backfires when shifting (1-2,2-3) and accelerating at a
reasonable pace.
The piston on my throttle jack solenoid doesn't move. I understand that its
purpose is to slow down the retraction of the throttle when you let off the
gas to prevent/reduce backfiring.
My car also has a hollowed cat. The air pump had frozen up and the air
injection holes were plugged by bolts. I was able to take the air pump apart
and get it going again. I don't remember the car backfiring so much before I
put the air pump back on.
Could either or both of those be the cause of the backfiring?
Also, there is a little switch hanging from wires under the carbs. What's it
for?
Thanks,
jvr
Jim Van Riper
95 Pontiac Firebird Formula Convertible - DrkGrn, TanLeather, M6
79 Triumph TR7 Convertible - DrkGrn, TanCloth, M5
70 Jaguar XKE Convertible - Robin's Egg Blue (ick), BlackVinyl, M4
94 Pontiac GrandAm GT 4dr (wife's)
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