Question about 1997 Chevrolet Corvette

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1997 corvette Cleared code and code p1221 came up runs rough and drops cylinders

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Dtc 1221
corvette 97

Posted on May 08, 2012

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Brutus96 contact me at lynng2006@comcast.net i had the same problem i might be able to help. (313)492-5321 george

Posted on Jul 08, 2008

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2.3l 2001 ford ranger rough idle and running rich and misfiring with p0301 code


You have to correct the cylinder misfires first

You may have vacuum leaks somewhere in the
intake or exhaust

You really need to look at data with a scan tool

You start with Mode $06 & cylinder misfire count ,if that
even works well on your motor

Then you look at fuel trim & add short & long together,
to get an idea if it is running rich,which would be a lean
condition from a vacuum leak or rich from leaking injectors

All the data is only good if you haven't cleared it or disconnected
the battery. If you did, then you have to drive until all I/M Monitors
run & then look at data

You look at O2 sensor data & even scope them

You made no mention of checking for codes
No mention of a cylinder leak down test for valve leaks
Exhaust Converter age or condition !
Fuel Pressure !

Mar 05, 2014 | Ford Ranger Cars & Trucks

2 Answers

Toyota Rav 4 1997 .Check engine comes on .Codes are P0301,302,303,304116 . What to do.


The engine coolant temperature is high. Your other Codes are for missing cylinders on cylinder 1,2,3,and 4. Get the Codes cleared and start over. Changing the plugs and wires,etc could have generated the missing cylinder Codes.

Autozone,Advance, and Oreilys will scan for free.

Check your engine for an IDLE SPEED CONTROL SOLENOID, which may be in the intake. Or a fuel pressure regulator.

A lot of times people work on the spark side and forget the fuel injectors. They can cause a miss.

Nov 03, 2012 | Toyota Cars & Trucks

2 Answers

Code p1221 on 2002 Chevy Trailblazer


its drive by wire system you need a new throtlebody/ acuator

Jun 15, 2012 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

Did a complete tuneup and cleared code but i still get cylinder misfire or multiple cylinder misfire.


is the timing correct did you do a compression test on engine possible engine misfunction does it run rough and miss no power

Jan 25, 2011 | 2001 Chevrolet Blazer

1 Answer

Rough run,misfire #7 cyl. replaced coil pack ,plug,& injector. still runs rough,but with no codes???


have you had the compression checked across the cylinders? **** sqeeze bang blow

Feb 25, 2010 | 1997 Ford F250 SuperCab

1 Answer

1989 corvette runs rough surges between 600 and 700 rpm. drive it for 20 minutes it totally runs awful. had to have it towed the other day..waited two hour for flatbed started car and it ran again..code 44...


try replacing the fuel regulator,that would make it get too much fuel and the code for o2 sensor will come on saying too lean or too rich fuel mixture,and it would run rough

Feb 14, 2010 | 1989 Chevrolet Corvette

1 Answer

Rough running


Computers aren't ALWAYS correct. If a code wasn't cleared after the original problem, it will read the same codes off to the diagnostic. I would remove the wire connector to each injector while it's running. If one of them makes no difference THAT is your culprit. Let me know please!

Jun 27, 2009 | 1999 Jeep Wrangler

1 Answer

1985 corvette


you might want to replace the plug end. I had a 99 neon with the same ploblem changed the sensor but the plug was shorted, changed that and it run great ever since.

Jun 26, 2009 | 1985 Chevrolet Corvette

1 Answer

I have a Ford F250 Extended cab that started running rough and losing power this morning got Codes P0301 P0303 P1151 and P0171 What should i Do?


P0301 = Misfire cylinder #1P0303 = Misfire cylinder #2
P0171 = System too lean cylinder #1
Are you sure on the P1151 code? I am thinking this may be a P0151 which is O2 sensor related.
This looks like you have a fuel system related misfire. I would do a fuel injection cleaning service and then clear codes and see if the codes regenerate.

Jun 05, 2009 | 1997 Ford F250 SuperCab

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