i recently purchased a 94 s10 blazer and poured over @700 into it and still having problems with it. I put a new fuel pressure regulator, plume, egr valve, trans oil cooler line in it, but it still cuts out some and runs a little crappy. The guy i bought it from said that they replaced the injector recently too. Any ideas? i want to keep it but i dont have the $$ to keep pouring into it

 

well im no expert or anything but my guesses are wiring to the injectors may be shady, or possibly a clogged/clogging filter or lines?

thats all i got lol--welcome to the forum![8D]

 

TSB's that might be useful:

INFORMATION ON LINEAR EGR VALVE INSTALLATION #57-65-28 - (Jan 2, 1996)
SUBJECT: INFORMATION ON LINEAR EGR VALVE INSTALLATION

MODELS: 1993-96 CHEVROLET AND GMC TRUCK S/T, M/L, C/K, P, G MODELS
1993-94 OLDSMOBILE BRAVADA 1996 OLDSMOBILE BRAVADA WITH 4.3L V6, 5.0L
V8, 5.7L V8 ENGINE (VINS W, X, M, R - RPOS L35, LF6, L30, L31)

WHEN INSTALLING LINEAR EGR VALVES, TAKE CARE TO ORIENTATE THE VALVE
PROPERLY BEFORE INSTALLATION. IT IS POSSIBLE TO ROTATE THE LINEAR EGR
VALVE 180 DEGREES, AND THEN INSTALL IT ON THE INTAKE MANIFOLD.

NOTICE: LINEAR EGR VALVES IMPROPERLY INSTALLED DO NOT FUNCTION AS
INTENDED. POSSIBLE DRIVEABILITY CONCERNS INCLUDE A ROUGH IDLE AND THE
SETTING OF CODES DTC 32 (EGR ERROR) OR DTC 1406 (PINTLE POSITION
ERROR).

LINEAR EGR VALVES IMPROPERLY INSTALLED MAY RESPOND TO HIGH VACUUM
CONDITIONS (AT IDLE) BY PULLING THE VALVE OPEN, OR HIGH BACK PRESSURE
CONDITIONS BY PUSHING THE VALVE OPEN.

WHEN REPLACING OR RE-INSTALLING A LEGR VALVE, INSTALL THE VALVE (WITH
A NEW GASKET) IN THE CORRECT ORIENTATION.

A NEW INSULATED GASKET FOR USE WITH THIS VALVE HAS BEEN RELEASED FOR
PRODUCTION AND SERVICE.

SEE FIGURES BELOW.

(INSERT TP0L3503 HERE) (INSERT TP0L3502 HERE) FIGURE 1 FIGURE 2

(INSERT TP0L3501 HERE) FIGURE 3

PARTS INFORMATION

APPLICATION DESCRIPTION SERVICE P/N

ALL LINEAR EGR GASKET ONLY 12555896 VALVES

IMPORTANT: THE NEW GASKET MUST BE USED WHENEVER A LEGR VALVE IS
REMOVED AND REINSTALLED.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

FIGURES: 3 ATTACHMENTS: 0

FIGURE 1. 1993-95 4.3L FIGURE 2. 1993 -95 4.3L LB4 TBI V6 ENGINE L35
CPI V6 ENGINE 1 - LINEAR EGR VALVE 1 - LINEAR EGR VALVE 2 - GASKET
ENGINE 2 - GASKET 3 - INTAKE MANIFOLD 3 - INTAKE MANIFOLD

FIGURE 3. 1996 4.3L LF6 AND L35 V6, 5.0L L30 AND 5.7L L31 V8 CENTRAL
SFI ENGINE 1 - LINEAR EGR VALVE 2 - GASKET 3 - INTAKE MANIFOLD

Figure 1

Figure 2

Figure 3

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL
TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM
THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO
PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A
VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS,
SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A
CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO
YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A
GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE
FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE
INFORMATION.

COPYRIGHT 1995. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.



GM bulletins are intended for use by professional technicians, NOT a
"do-it-yourselfer". They are written to inform these technicians of
conditions that may occur on some vehicles, or to provide information
that could assist in the proper service of a vehicle. Properly
trained technicians have the equipment, tools, safety instructions,
and know-how to do a job properly and safely. If a condition is
described, DO NOT assume that the bulletin applies to your vehicle, or
that your vehicle will have that condition. See your GM dealer for
information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

 

Document ID# 503176
1994 Chevrolet Blazer - 4WD


--------------------------------------------------------------------------------

SPECIAL POLICY ADJ. - LINEAR EXHAUST GAS RECIRCULATION SYS. #96067A -
(Jun 1, 1997)
SUBJECT: 96067(A) - SPECIAL POLICY ADJUSTMENT - LINEAR EXHAUST GAS
------------------------------------------------------ RECIRCULATION
SYSTEM --------------------

MODELS: 1992-94 S/T,M/L,C TRUCKS EQUIPPED WITH 4.3L ENGINE (L35 OR
LB4) AND -------------------------------------------------------------------
LINEAR EXHAUST GAS RECIRCULATION VALVE (LEGR)
---------------------------------------------

THIS BULLETIN CANCELS AND REPLACES SPECIAL POLICY BULLETIN 96067
ISSUED FEBRUARY, 1997

THE SPECIAL POLICY HAS BEEN EXTENDED TO COVER 1992 S/T AND M/L TRUCKS
EQUIPPED WITH 4.3L (L35) ENGINE. THIS REVISION ALSO CONTAINS CHANGES
IN THE "SERVICE PROCEDURE" TO CLARIFY THAT ANY ADDITIONAL NECESSARY
DIAGNOSIS AND REPAIRS THAT ARE NOT RELATED TO THE LEGR CONDITION ARE
NOT COVERED BY THE SPECIAL POLICY. ALSO, THE "CLAIM INFORMATION"
SECTION IS REVISED TO ADD LABOR OPERATION T-2209 FOR PERFORMING A
SYSTEM CHECK WHEN DETERMINING THAT THE LEGR SYSTEM IS NOT INVOLVED
WITH A CUSTOMER COMPLAINT. THE CUSTOMER SHOULD NOT BE CHARGED FOR THIS
SYSTEM CHECK.

This Special Policy Adjustment applies only to those vehicles that are
equipped with Linear Exhaust Gas Recirculation Valves. Some vehicle
lines equipped with 4.3L engines in a given model year were built with
and without Linear Exhaust Gas Recirculation Valves due to the
emission control requirments of various combinations. There are too
many variables to describe in this bulletin. The only sure method to
determine if a certain vehicle is involved is to interrogate VISS
(under the heading VEHICLE WARRANTIES) or GMC ServiceNet (referring to
the VEHICLE WARRANTY COVERAGE) to see if this special policy applies.
Both VISS and GMC ServiceNet will display the following message for
involved vehicles - "LINEAR EGR VALVE SPCL POLICY #96067".

CONDITION

Some customers of 1992-94 model year S/T, M/L and C trucks may
experience Linear EGR valve sticking, or foreign material holding the
valve open/closed. This will cause a DTC 32 to be set which may be
accompanied by poor driveability conditions such as engine surge,
engine knock, engine stall, rough idle, and/or hard starting.

CAUSE

Carbon deposits or foreign material affecting Linear EGR operation.

SPECIAL POLICY ADJUSTMENT

This special policy covers the condition described above for a period
of seven years or 75,000 miles (120,000 km), whichever occurs first,
from the date the vehicle was originally placed in service, regardless
of ownership.

The repairs will be made at no charge to the owner. This special
policy applies ONLY to repairs requiring Linear EGR system servicing.

VEHICLES INVOLVED

Involved are certain 1993 and 1994 S/T, M/L and C trucks equipped with
4.3L engines built within the following VIN breakpoints:

PLANT YEAR DIVISION MODEL PLANT CODE FROM THROUGH ---- --------- -----
------------ ----- -------- -------- 1992 Chevrolet M/L Baltimore "B"
NB100005 NB234001 1992 Chevrolet S/T Pontiac West "0" N0100005
N0164189 1992 Chevrolet S/T Moraine "2" N2100046 N2226380 1992
Chevrolet S/T Shreveport "8" N8100006 N8100012 1993 Chevrolet M/L
Baltimore "B" PB100001 PB225266 1993 Chevrolet S/T Pontiac West "0"
P0100002 P0196990 1993 Chevrolet S/T Moraine "2" P2100001 P2218436
1993 Chevrolet S/T Shreveport "8" P8100003 P8100009 1993 Chevrolet C
Fort Wayne "Z" PZ100018 PZ259079 1993 Chevrolet C Pontiac East "E"
PE100006 PE254274 1994 Chevrolet M/L Baltimore "B" RB100000 RB248996
1994 Chevrolet S/T Pontiac West "0" R0100001 R0184858 1994 Chevrolet
S/T Moraine "2" R2100001 R2179415 1994 Chevrolet S/T Shreveport "8"
R8100009 R8242802 1994 Chevrolet S/T Linden "K" RK100003 RK18399

 

ok some things i didnt put in the first post, also put new plugs and wires. and its a s10 blazer. my cousin is a certified mechanic that installed all the parts. and if possible please tell me stuff in leymans terms because im not much of a mechanically inclined person sorry. thanks tho for even replying

 

Have your mechanic do a basic fuel pressure test.

Could you post up more information about what its doing wrong. When, what speed, stopping, starting, rough idle, etc....

 

he ran a fuel pressure test when he replaced the fuel pressure regulator and the plume. it idles rough sometimes when sitting. mostly it just is kinda jerky runnin down the road and doesnt have a lot of power when running down the road and u mash on it

 

Mash on it.....haven't heard that in a while![8D]

 

My thoughts are maybe EGR Valve, but you said you replaced it, so....? Maybe the plugs and wires weren't in the right order when replaced?