p1131 code no throttle response , run rough

[jsl22]

i am new to these v8 sho, on the v8 sho which is bank 1 and which is bank 2 on the cyls ? i have a 97 that has almost zero throttle response and terrible idle and feels like it is running on 4 cyl, as you press gas no response or very little . it will have a little response just off of idle and then a little as you back pedal it and drop down closer to icle.i had no eng light til after the autozone chked it and the code was a p1131 which is something with the heated o2 sensor .... any sugestions would be greatly appreciated thanx jack l .,.... call if you need to plse 931 636 7025

 

[Mr Anonymous]

Please only post one topic in one section. Multiple postings of the same problem usually end up in getting LESS help.

Here are some possible causes of the P1131 code you're seeing (which, btw is upstream bank 1, or rear bank):

Electrical:
· Short to VPWR or VREF in harness or HO2S
· HO2S circuit shorted to Ground
· Water in harness connector
· Open circuit
· Corrosion or poor mating terminals and wiring
· Damaged HO2S
· Damaged PCM (other DTCs should be present)
Fuel System:
· Excessive fuel pressure (stuck fuel pressure regulator, restricted fuel return lines, etc.)
· Leaking/contaminated fuel injectors or fuel pressure regulator
· Low fuel pressure or running out of fuel (fuel pump concern, fuel supply line restrictions, low fuel level, etc.)
· Vapor recovery system (stuck VMV, etc.)
Induction System:
· MAF contamination
· Air leaks between MAF and throttle plate
· PCV system / Other vacuum leaks
· Improperly seated engine oil dipstick
EGR System:
· Leaking gasket
· Stuck EGR valve / Leaking diaphragm or EVR
Base Engine:
· Oil overfill
· Incorrect cylinder compression
· Exhaust leaks before or near the HO2S
· Secondary air stuck on

Your driveability issues are probably unrelated to the P1131 code. Likely that you have one or more bad coils, or if it's very bad you might have spun a cam.

 

[jsl22]

whats the easiest way to do comp chk on thes puupies or to determine if it is mech? ty jack l

 

[Mr Anonymous]

whats the easiest way to do comp chk on thes puupies or to determine if it is mech? ty jack l

A compression test on a SHO motor is no different than one on any other engine. Remove a plug, install the compression gauge, disable the fuel system (pop the IFS in the trunk) and crank the engine. If you have a spun cam, you will see zero compression in one or more cylinders.

 

[jsl22]

found unattached ground cable on pass side top of firewall .. its hooked to fire wall but need to know where other end goes lol . its about 12 - 14 inches long and a braided wire ... thanx oh yeah what should comp be?

 

[MilTownSHO]

You can find alot of the answers to the questions you are asking on www.v8sho.com

 

[Mr Anonymous]

found unattached ground cable on pass side top of firewall .. its hooked to fire wall but need to know where other end goes lol . its about 12 - 14 inches long and a braided wire ... thanx oh yeah what should comp be?

Should go from the firewall to the lower post securing the pass side rear tank strap. For the short-term, you can just tie it to the same post where the PS line retainer is bolted.