some one make my day better and tell me i didnt mess up my new engine.
#1
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so i rebuilt my 5.3 with a 222/230 596/600 111 lsa cam with ported heads, i just got the engine in yesterday with a built 4l65 and a 2300-2500 stall converter.
i went to take it for a short ride down the street and had to accelerate 2500+ rpms to get up to speed, thats the converter but about a half mile away the truck shut off with no noises or anything.
The AFR was 14.6 good as could be and the truck would not start back up. i disconnected the battery for 10 mins and bam fires up but wont run as long as it used too it keeps shutting off.
Im getting it tuned shortly but is this happening because the stock pcm doesnt like the cam one bit?
its a 2000 gmc sierra
i went to take it for a short ride down the street and had to accelerate 2500+ rpms to get up to speed, thats the converter but about a half mile away the truck shut off with no noises or anything.
The AFR was 14.6 good as could be and the truck would not start back up. i disconnected the battery for 10 mins and bam fires up but wont run as long as it used too it keeps shutting off.
Im getting it tuned shortly but is this happening because the stock pcm doesnt like the cam one bit?
its a 2000 gmc sierra
#4
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alright becuase the reason i was skeptical was i ran the motor for like 15 mins for no problem and drove it for 5 anyway i was also just told today that you should not bore these ls block more than .010 over because of thin walls? well mines .030 how dangerous is this?
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#10
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all the grounds are where they should be and tight i paid special attention to that, any way i uploaded a video of me trying to keep it running just so i can check for leaks. This thing should lope realllll nice once tuned
#11
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iron block, if sonic tested, can be bored quite a bit. Aluminum LS1/2/3 blocks usually can only take 0.005-0.010 at the max.
#13
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Man not trying to scare you, but you should never run a new engine untuned. The thing could be dumping fuel into the cylinders and washing your rings down which could cause them to never seat properly.
The first startup through the first 5 miles are the most critical part of a new engine break in.
The first startup through the first 5 miles are the most critical part of a new engine break in.
#15
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#17
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It's just a bad idea breaking in a motor until the tune is at least in the ballpark.
Anyway, use break in oil then moderate throttle up to like 3500-4000 rpms and then engine braking back down to about 2k, repeating that 10 or so times. Change oil after the first 50-100 miles. Put in some more break in oil and run it another 500-1000. Change to oil of choice or whatever the builder recommends.
There, the engine is broken in.