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Old 09-05-2012, 12:26 PM
BogiesAnnex1 BogiesAnnex1 is offline
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Originally Posted by rack View Post
Hi guys,

Recently I got my 1990 Chevy Suburban imported from USA. I like it very much.
As every old car, there are some problems with it.
It is SBC 350 with TBI.
First, it runs very rich (at least I think so). I have to pres accelerator to start it, there is black smoke, very noticeable gasoline odor, rough idle and it often die on D or R.
I plan to buy TBI rebuild kit but rockauto supply two kits, one for TBI100 & TBI200, the other for TBI220 & TBI295.
How can I identify what TBI is in the car?

Also, I will be very grateful for any tips and suggestions on what to look or set in order to get proper operation.

Thanks a lot for your help,
Runing rich on idle can have several causes, for example:
- Throttle Position Sensor failed or misadjusted
- Idle Air Controller (IAC)
- Coolant Temp Sensor
- Fuel Pressure Regulator
- Obstruction in the fuel return lines to tank
- Pressure build up in tank due to failed venting system

This list can go on, if the error is in sensing it should be showing the CEL light then you can down load the Check Engine Codes from the connector under the instrument panel by your knee. You really need a maintenance manual as these electronic things are difficult if you're going at it with no info.

To determine the Rock Auto kit you need to rebuild the TBI you need to get the injector part number which is readable on the tops of the injectors. Here's a list of what goes to what.

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File Type: doc TBI_System_Type.doc (45.5 KB, 13140 views)
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rack (09-05-2012)