TPI SD 350 5.7...
Okay i aev no end of problems with this engine and spent alot i finally fixed my running rich condition with setting timing to 6 degrees and changing MAT sensor after changingjust about everything else..

My new problem is it starts fine runs 95% smooth..Then once it changes loop when warm you here the revs drop it nearly stalls and starts to show mild popping noises...If you rev it theengine stumbles and will not rev high...

Im sure this is now going to be something really silly..

Im thinking timing needs slight tweek?...by how much im not sure i set the base timing from cold???

Maybe the O2 is clogged up or damaged due to the previous rich condition???

I have the VSS turned on but not yet connected this will that cause problems?

I have not actually drove the vehicle yet for a long time...But the engine is fully cleaned out with many new parts..

Please help i feel so close to actually getting this fixed but dont want to make things worse its the best its ran for around 1 year of playing with engine..

Paul