It sounds like a vacume leak if you can put a extention on the bank1 sensor 2 the one behind converter
Testimonial: "that whole pipe is all new and i put alot of money in it i just bought this car.i put all the new parts in "
Bank 1 system to lean below threshold that's telling you the system is lean... If you done all that other work including intake manifold gasket n new injector o rings, and your car hesitates n has CEL on, but no vacuum leaks at all it's telling you that you need the rear o2 oxygen sensor, try that n let me know if the CEL goes away. I did my intake mago ls gaskets cuz it needed them, it had a leak n new injector o rings after I replaced that my car ran a whole lot better but the light was still in and my car hesitates n loss power changed the o2 rear sensor car is driving like a 2012 malibu hell yeah!!!140$ in require parts that are nessasery = new car all over again. Let me know if helpful or if you need more help.
SOURCE: Low Oil pressure light in idle at stop
Depending on the amount of miles, maintenance records, or how hard the car has been driven either by a previous owner, or by yourself. The engine's main crankshaft bearings or the connecting-rod bearings could be excessively worn.
Also, it could very well be a wiring problem to the sensor and/or computer causing the problem.
SOURCE: PO420 CODE ON CHEVY S10
Hi
The code means---
Catalyst Efficiency
Below Threshold
(Bank 1)
Please make sure there is no air entering the engine behind the maf, such as a vacuum leak or leaks in ducting between the maf and the throttle body.
If that's no the case then its an issue with injectors clogging and they are not working due to "fretting". This "fretting" is electrical terminals to injectors getting oxidation on them and is fixed by unplugging them and replugging them in. The fix is to put a small dab of die-electric grease on the terminals.
I would suggest an injector service with the new GM procedure using "Top Engine Cleaner". This may be all you need but that P0420 bothers me. P0420, Catalyst System Efficiency Below Threshold, can be set by a poor connection at the PCM or a damaged wiring harness.
Please rate this soluton as FixYa if found useful.
Thanks
Rylee
SOURCE: 98 Chevy Tahoe 5.7 liter engine cuts out and
Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?
SOURCE: 1993 Chevy S10 Blazer engine hesitation with smoke from exhaust
Had a 94 Olds Bravada that did a similar thing and it was EGR valve on the front of the intake. It' s easy to take off and clean with WD 40 and if you have an air compressor blow it out good.
You have a problem with Oxygen sensor or you have bad fuel type
put a good fuel for a whole or replace the sensor if it is old
its location on the exhust pipe
196 views
Usually answered in minutes!
×