dragon93308

iTrader: (1)

I just got the 408 into my car, hooked everything up and tried to prime the engine, it cranks over once and looses power to the entire car, but power comes back immediately, then it cranks again and looses power and so on. The battery is fully charged, all of the grounds are hooked up. I tried adding another ground from the block to the body, and the block to the battery, and hooked up another hot wire from the battery to the starter. Im running out of ideas on what it could be. Any thoughts?

1fstbird

iTrader: (19)

I wouldnt know what to think either but have you checked the ground that runs to the starter. I know I had that problem and thats what it was. Just a thought.

Slo_240sx

iTrader: (17)

Make sure all of your grounds are clean. Its definately high resistance somewhere in a main cable. Make sure your starter draw isnt too much. Second, how long did the battery sit? It may need to trickle charge over night if it sat too long. Tighten up that ground at the battery.

dragon93308

iTrader: (1)

Battery was working in another car until i put it in the vette today. I tried putting the charger on it for an hour and nothing happend. Il try cleaning up the grounds.

Z'mnypit

iTrader: (58)

Maybe a stupid question but the car isnt just dying after start up is it? I mean on a H/C tune in my car with the 408 it would start then die, then restart then die until I sorted out a good tune... Its prolly not your issue but I was just checking.... Good luck

dragon93308

iTrader: (1)

No, the starter is only clicking over once then dying.

Slowhawk

iTrader: (12)

First pull the plugs and turn the motor over by hand.This will verify that it is not P/V contact stopping the motor. Next I would look at the starter connections.

blkvett01

I just finished installing a 408 in my vett. It's sounds like the wires on the starter are not hooked up right. Make sure that they are in the right place because it will cause the problem you are having. Second any wiring in the install that is not hooked up right or has a problem will cause feed back in these cars. I have found out the hard way on more than once. There are three important hook ups that can cause the car to not to turn over. One the crank position sensor, two the cam positions sensor, and one that most do not think of (me) oil level sensor. I had the wire to this sensor get to hot from the headers and the car would not start and would not turn over at one point when they where grounded together. So check these and hope you find your poblem soon.

blkvett01

Ps just a question why did you choose a 114 lsa with a mn6? Seem like you would give up some power under the curve? Just wondering. Thanks

dragon93308

iTrader: (1)

Well i figured out what the starting problem was, it was just a ground on the starter.

I started the motor and it sounded sweet, for about 30 secconds, then a horrible clacking sound. Thinking the worst i took off the passenger side valve cover and found this



Those are TSP PRC stage 1 heads with the valve job. Brand new heads. I feel sick.

ArcticZ28

iTrader: (14)

WOW. That's some sickening stuff right there. I'm sure you've contacted them already. Let us know how it goes. Hopefully nothing got down into the chambers and scarred anything up

BlkHwk

iTrader: (8)

DrkPhx

iTrader: (15)

Damn, that makes me sick just looking at that picture. Never seen that before. At least it didn't run long. I would send them back and go buy another brand head better suited for a 408.

Pro Mouse

iTrader: (15)

Ouchie ,that sucks ,look like a bad casting

Ls1Bait

Dam..................Id be pissed man. Talk to the company that sold them to you and they should do something for ya

SVC707

iTrader: (33)

ouch that really does hurt right there

dragon93308

iTrader: (1)

Yea, thats what im thinking. I emaild texas speed. i guess il have to wait to see what they say.

Ferocity02

iTrader: (60)

You may want to double check that your pushrods are not too long. Did you verify PV clearance? Only reason I ask is because either will put too much stress on the rocker and break the rocker or the head as what happened to you.

dragon93308

iTrader: (1)

yea i checked the puchrod legnth and the ptv clearance so that wasnt a problem.

stang90gt50

iTrader: (6)

Your Diamond pistons are no where near for PtV issues, they had a ton of room for more lift.

I hope TSP steps up and sends you out a new head asap.