I installed trick flow stage 1 cam and 170 Trick Flow heads/ 24 lb injectors/ calibrated MAF meter. After install car surges n cuts off after it warms up. If i drive it and it cuts off once i try to start it. It will start but idle will jump n most of the time cut off. Sometimes it regains. Do i need a tune?
What i tried so far:
1. Idle reset - have not driven it to relearn ecu yet.
2. Vacuum gauge reads 13 hg jumps a bit
3. Cursed
4. Dont know what else to try....
Did you check out port alignment between the manifold and the new heads?
When I did my 347 the mani had to be cut IIRC .090 sides and .120 on the flats
just to get a good match and a good crush gasket at the bottom of the port.
You need a tune, but just live with it unless you wanna spend the money. It will read closed loop at WOT and run strong. You have a 225hp tune for a 350hp engine..
Scan for codes. With the mods you have done it won't idle like stock, but it also shouldn't die and surge like crazy. I have done the exact setup you have more than once, never had a tune, always have run decent.
I installed trick flow stage 1 cam and 170 Trick Flow heads/ 24 lb injectors/ calibrated MAF meter. After install car surges n cuts off after it warms up. If i drive it and it cuts off once i try to start it. It will start but idle will jump n most of the time cut off. Sometimes it regains. Do i need a tune?
What i tried so far:
1. Idle reset - have not driven it to relearn ecu yet.
2. Vacuum gauge reads 13 hg jumps a bit
3. Cursed
4. Dont know what else to try....
Do you need a tune yes. But 13 hgi for that cam sounds low, and the fact that it is jumping could be from the surge. I am running trick flow heads and a bigger cam and I am pulling close to 20 inches of vaccum. Check for a vaccum leak.
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