99 tahoe p0300 brought freeze frame

[yetiford]

Tahoeforum Newcomer
Join Date: Oct 2013
HEY GUYS new to the site glad to be here [sorta] all of a sudden lastnight my 99 'hoe with 350 went nuts scanned it got p0300 come up pulled freeze frame it looks as follows fuel system 1&2 cl fault ,load pct 23.5 , etc 171 , shortft 1 0.0, longft 1 5.5 , shortft 2 9.4 , longft 2 4.7 , map 21.6 , rpm 1801 , vss 37 , maf 6.922 , tp 27.8 , now i can guess which numbers are way off but would like to know why any help would be great thanks to all

 

[lesterl]

Fuel trim on pass side is high, possible FPR leaking in fuel injector pod.... Check for fuel pressure bleed off....

 

[rockenthebowtie]

There is something definitely going on with that right side however a positive fuel trim reading is a rich correction for a lean condition.. In either case if its a leaking FPR and or plugged injector(s) its going to need the CPI unit Nice observation lesterl.. because I actually didn't see it until I read your post

 

[lesterl]

Yeah, l need to try and catch up on some sleep as lately I have missed a few things lately lately. Positive trim is adding fuel to compensate for a DETECTED lean condition, also check for vac leaks, and leaks in exhaust... I just replaced a manifold donut and welded some piss poor pipe connections from a PO on my truck..... Fuel trims read much different now...... Also cleaned my MAF sensor.

 

[yetiford]

thanks

thanks for the input i was fearing that , this happened all at once only thing i can remember that might of been a warning was a few months ago twice within a week or two id kick it down to pass someone and id get the light check it and it would say miss in cylinder 3 but it never did it again thought it might be the autolite plugs gonna change all of them anyway im going to pull some parts off the 97 to see what happens and take it from there see im more of parts swapper than a actual mechanic electronics is my bane i preferr older cars thanks again

 

[rockenthebowtie]

De nada.. only I don't recommend that you swap the CPI injector unit the one in the 97 coul be just as bad or worse

 

[lesterl]

Swap the injectors in the pod man, if problem moves to another cylinder then you can buy just the 1 poppet injector, try some Techron fuel system cleaner and see if it doesnt help....