TBIThrottle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.
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"dreaded" Crossfire? Don't let the regular TBI guys get you down. All of the TBI cars, including the Crossfire, are very sensitive to vacuum leaks and proper operation and adjustment of the various sensors.
The code 22 should be an easy fix. You just need to adjust the position of the TPS sensor so the idle voltage reading is in spec. You want it as close to .525 volts as you can get it. The factory service manual says +- .25 volts is fine.
On the code 33, I would check to make sure that the vacuum line from the MAP sensor to the intake is connected and in good condition. If so, your MAP sensor may be bad. I don't remember any testing procedures in the services manual on testing MAP sensors.
Again, TBI cars like all sensors working and good vacuum lines. If you just started working on this particular car, I would replace ALL of the vacuum lines. I also recommend getting a factory service manual. Lots of really good info.
__________________ Relatively original 1982 Z-28 with Crossfire, T-tops, and A/C delete.
Mods: 355 cid, Edelbrock Performer AL heads, X-Ram intake, COMP 249XE cam, 65# injectors, 2.0-inch throttle bodies, EBL Flash computer, complete MSD ignition system, K&N air filters, Hooker shorty headers and y-pipe, Edelbrock cat-back exhaust system, TCI Street Fighter TH-350, TCI 2200 RPM stall converter, 3.73 gears in stock posi rear end, SSBC two piston aluminum front calipers.
Corbeau GTS II seats covered to match new door panels, new carpet, Momo steering wheel, Sony cassette player and speakers.
No exterior mods. Mostly original paint, original wheels with BFG raised white letter tires.
Also own 1969 Camaro, mods too numerous to list. Supercharged 350, Tremec TKO, 12-bolt Posi with 3.73s. Details on website at www.geocities.com/gheatly
"dreaded" Crossfire? Don't let the regular TBI guys get you down. All of the TBI cars, including the Crossfire, are very sensitive to vacuum leaks and proper operation and adjustment of the various sensors.
The code 22 should be an easy fix. You just need to adjust the position of the TPS sensor so the idle voltage reading is in spec. You want it as close to .525 volts as you can get it. The factory service manual says +- .25 volts is fine.
On the code 33, I would check to make sure that the vacuum line from the MAP sensor to the intake is connected and in good condition. If so, your MAP sensor may be bad. I don't remember any testing procedures in the services manual on testing MAP sensors.
Again, TBI cars like all sensors working and good vacuum lines. If you just started working on this particular car, I would replace ALL of the vacuum lines. I also recommend getting a factory service manual. Lots of really good info.
strangely when when I was checking for a vacuum leak Wednesday both codes went out and never came back with no clearing of the codes. I ran it for about five minutes.
but Thursday my car now has a backfire now.
The Map sensor is a 0-5V devise. with engine running and digital Vmeter attached I presume you should see the V change as you move the T linkage. idle may be like 2 V and WOT 5 V. As you move T that volts should change. If defective it may not move.
The attached pdf file has the service tests for Code 22 and 33 from the 1982 Camaro Service Manual. Print the file out, as tow of the pages were scanned upside down and follow all the instructions.
Hopefully this will help you resolve these two problems.
The attached pdf file has the service tests for Code 22 and 33 from the 1982 Camaro Service Manual. Print the file out, as tow of the pages were scanned upside down and follow all the instructions.
Hopefully this will help you resolve these two problems.
Dave
thanks dave
but I only have a code 22 now and the code 33 never came back.
