kleetis

so I got my engine (305 tbi) back together after putting a cam it. but now it backfire out of the tbi only when given gas and at high rpm above 3 i checked timing a couple times and it looks good the only things that i have changed was the rotor on the distributor got broke in the process so a new one of those the map sensor vacumn got broke and I started it without it in the beginning and had it run a little but then replaced the line and the only other thing it the coolant temp fan switch but that should have anything to do with it i don't think. oh and the o2 sensor is just on the #1tube for now... thanks


this is not my video but this it exactly what my car does
https://m.youtube.com/watch?v=cwUOsc6YZMk&feature=youtu.be

BOTTLEDZ28

iTrader: (9)

What is your timing set at with the EST wire disconnected? It should be 0 degrees.
What do your plugs look like

kleetis

brand new olugs and wire look fine nothing wrong with them... it's set at zero but not with the eat wire disconnected.. sorry I'm still learning... where can I find this on my car and how do I redo the timing?

BOTTLEDZ28

iTrader: (9)

The EST wire is a brown and black wire connector.
It must be unplugged prior to starting the car to do the timing. Once timing is set to 0-4 degrees, shut car off and disconnect battery for a second, then plug the est wire back in and connect battery. Your timing will now be correctly set.

https://www.thirdgen.org/forums/tpi/...-question.html

kleetis

thank you a lot they didn't teach us that in college yet, ill give it a try thanks again for your help

BOTTLEDZ28

iTrader: (9)

no problem, let us know you make out.

kleetis

yeah it helped a little I'm not misfire as bad now I found out i mind not have a wire put on on the way so I'm just trynna figure out imma put it on bc it's hugging the **** out of a header tube and I can get the right angle to put it on... uggghhh

kleetis

ok I make sure all plugs were good I am pretty sure 6 was misfire the wire was not on all the way n neither was the plug so I fixed all that and it still does the same thing sitting in neutral am able to rev it and get a few pops from the front and in drive and hit the gas it bogs out and almost dies

Schurkey

Scan tool. Watch the data stream.

BOTTLEDZ28

iTrader: (9)

Did the car idle at 0 degrees and stay steady after you tightened down the distributor with the EST wire still unplugged? Do you have the timing light set up correctly? Pickup wire on the number 1 one plug?


Who did the cam installation? Was it installed correctly?

kleetis

i dont own a timing light it would idle around 1100 with still a little pop ever few seconds from the right side header and I installed the cam my self I thought it was done correctly but obviously I messed up somewhere along the way imma gonna try and find time to take it to a place to get it scanned if nothing come up ill prolly end up take it to a shop and have them deal with it.

kleetis

i got it fixed my valve lash was royally f*cked up..

ShiftyCapone

iTrader: (7)

If you don't own a timing light how did you set the timing? Also, with a cam swap you are going to want to get into DIY chip tuning. Without it your car will never run the way you want it to.