Hoping a lot more knowledgeable than me can look this file over and see if anything stands out. I am very mechanically inclined but this is my first rebuild with almost zero help other than what i could find on youtube and forums. Please let me know any specific info that could be helpful thanks in advance.
Background.
1991 Chevy K5 Blazer SBC 5.7l
engine was rebuilt and bored .030 over and converted to hydraulic roller
has new heads from summit
new distributor
new temp sensor
new map sensor
new alternator
new plugs
new plug cables
new fuel pump - tested ok with rented fuel pressure gauge from parts store - replaced all rubber lines to fuel pump
new icm - have back up just incase both checked out good at the parts store
etc...
The issue i have is when get over a certain RPM is starts to misfire and "bog out" around 2275 rpm
Wiring has been checked and re checked
I did pull timing connector to verify timing and i believe that set the code 42 error code or it came on when I hit 2275 rpms not entirely sure. The test I did previous did the same thing as far as bogging out or miss firing but did not throw a code.
I have fought this issue for a while finally found tuner pro to try to better understand whats going on only im not entirely sure how to read all the data. I can tell that my BLM is low not around the 128 it should be but not sure if thats related to my issue with the bogging down.
Bookmarks