well i just rebuilt my motor and it starts on fine but like it misses and i get code 42,when i had the code before i change the module and it when away now i change it 2 days ago and light still comes on with like 5 min of driving it wat can it be?also code 44 lean exhaust can it be that im actually lean or my 02 when bad while swapping engine also i think i dont have enough vacumn because my a/c doesnt blow as hard as it use to

 

when i swapped in new cam #1 i too received a lean code on daily driving. i was lean. i first tried a vafpr but continued lean at cruise rpms. i ended up swapping in larger injectors. that required i learn to burn chips.

 

so wat did u do. put injectors from a 350 tbi motor?the stock ones or the police caprice ones?also wat about code 42 that make my engine miss a lil

 

if you swap in larger injs you will go from too lean to too rich. that requires a chip tuned for the added fuel. i dont think you can swap in larger and be close enough on tune. i am assuming you are lean due to lack of fueling? the vafpr is used by some but that is primarily WOT added fueling. you could get the FP up a bit higher and see how it runs with stock injectors. i assume you have a fuel gauge.

 

so tell tbichips to burn me a chip with more fuel, then i already have a gmvafpr and fuel gauge so lets see wat happens

 

Your Code 44 might be due to a bad O2 sensor. The factory sensors are known to be sensitive to the "fumes" of RTV/Gasket sealers. Of course, you might really be lean, too... Can you connect a scan tool to the ECM to see what the sensor is reporting?

I have to ask the obvious question. But, you did remember to reconnect the EST connector after setting the initial timing on your motor, right? I know I've gotten in a hurry and forgotten to reconnect the line before.

Good luck!

 

okay i change my o2 sensor and code 42 and 44 went away but i drove it for like 30 min and it ran alot better but when i turn it back on it has like no power and misses like crazy i mean it wont go past 2800 rpms it chokes i dont know wat the hell can it be?

 

What is your base timing set at? Once you have that dialed in you are going to need chip work. This is somthing that takes time and patience but is far more accurate than any "mail order" chip.

 

i think a datatlog will give you some valuable info. otherwise you can guess as to what it needs. a wideband would also be helpful. but that is another story. all this assumes no mechanical issues.

 

i found out why the car ran like **** a rocker press instud pop out of place so i replace all with screw in studs from arp.base timing is 8*-12* lower then idles gay.i have on a chip from brian of tbichips.com but hes going to make me a new chip for a better base timing and fuel curve and for the lt1 cam.oaky today i just finish changing my manifold gaskets and screw in studs but now code 42 is back wat the hell can it be now? i set the new base timing connected the plug crank it back on engine still misses a lil lil but code comes on wat now?module like 10 days old u think it got damage with removing the distributor?or wat else can it be how about the pickup coil inside the dist?it looks ugly rusty brown color and plug that connects to module is crunchy and breaks a lil more everything i change the module. wat does that really do?

 

You can check the pick up coil with a volt meter. I believe it should be between 500 and 1500 volts. If not it is fried. Did you put some dialectic greese under the module when you replaced it?

 

yea i did put that white grease under,becuase if u dont put it on it will go bad correct? and wat happens if the pickup coil is bad?

 

If you do not use the greese you won't have a good contact. If the pickup coil is bad you will have all kinds of wierd ignition related problems. I know that is vague, but a simple check will tell you if it is bad or not.

 

wat kind of problems will i have with a bad pickup coil?and how will i check if it is bad

 

You will have intermitend start-up problems as well at stuttering, stalling, and a few other common iognition reladted woes. You can check it with a volt meter. Any service manual for our cars will tell you how. I believe the voltage needs to be in the 500 to 1500 range. If it is not, than corrosion is probably the culprit.