95 Blazer engine problem CPI 4.3L

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Since: Jun 07

Portsmouth, Va

#1 Jun 29, 2007
Just had remanufactured engine put in recently and having problems. Engine seems to have a steady miss at idle and hesitates when driving at any speed. Feels like a vacuum leak but cannot locate one. Have new plugs, wires, dist. cap, and some new sensors. Engine light not coming on so no codes. Almost no power after take off. Drinking gas like crazy!! Any suggestions on what may be the problem? Has been running ok until past few days.
Jim_1995_VIN_W

Barrington, IL

#2 Jul 2, 2007
Jim n Va wrote:
Just had remanufactured engine put in recently and having problems. Engine seems to have a steady miss at idle and hesitates when driving at any speed. Feels like a vacuum leak but cannot locate one. Have new plugs, wires, dist. cap, and some new sensors. Engine light not coming on so no codes. Almost no power after take off. Drinking gas like crazy!! Any suggestions on what may be the problem? Has been running ok until past few days.
Have you checked the EGR valve? My VIN W was exhibiting similar problems but didn't always set the SES. FYI, GM released an updated MEMCAL (ROM) that addresses that condition, it's code is "BWAK". You can buy one from a dealer for $70+ or you can get one from www.rockauto.com for about $45. The GM part number can be gotten from a dealer; enter that number in the Search window on RockAuto's site. FYI, my former MEMCAL code was "BNHD".
Jim_1995_VIN_W

Schaumburg, IL

#3 Jul 5, 2007
FYI, the GM part number for the BWAK MEMCAL is 16239464. It's applicable to (at least) 1995 VIN W platforms with the "PCM" engine control unit (the "PCM" controller's located above the passenger's footwell; note that the "VCM" engine control unit, a different unit which was also used for some 1995 VIN W engines, is located on the coolant recovery tank underhood; this MEMCAL does not apply to the "VCM" VIN W controllers, only the "PCM"). GM Service Bulletin 67-65-38A describes the sticking EGR valve problem and lists this MEMCAL as software upgrade which remedies the problem.
T Ross- PA

Butler, PA

#4 Jul 15, 2007
I just purchased a 1985 mercruiser 4.3 V-6 with a Carb. just to find out that it had not been winterized 1 freeze plug came out and it cracked the exhaust manifold. I replaced the plug and repaired the manifold. now when I get the engine up to operating temp. and the thermostat opens up , I am getting water in the oil. any way to fix this ?
MOTOR CITY MADMAN

Taylor, MI

#5 Jul 20, 2007
T Ross- PA wrote:
I just purchased a 1985 mercruiser 4.3 V-6 with a Carb. just to find out that it had not been winterized 1 freeze plug came out and it cracked the exhaust manifold. I replaced the plug and repaired the manifold. now when I get the engine up to operating temp. and the thermostat opens up , I am getting water in the oil. any way to fix this ?
Most likely you've got a cracked block/cylinder/oil passage from the freezing - unfortunately, only true way out is a new short block or complete motor....sorry!
MOTOR CITY MADMAN

Taylor, MI

#6 Jul 20, 2007
Oh yeah - heads may be damaged also (or they may be the cause as well)- a complete long block may be required instead of just short block - sorry again! This is from MANY years experience with old jet boats restoration/repair, many were not well taken care of for winter - Best of luck to you!
T Ross- PA

Butler, PA

#7 Jul 21, 2007
Motor City Madman

Thanks for your response you were the only reply out of about six different forums
How hard is it to pull this engine. anything else i should look for that could be damaged frim the freeze other than the block, from the engine back.
I found an engine out of a 1991 Chevy blazer 4.3 V6 it has fuel injection and mine is carb will this work?
Thanks for your advice
R Wills-CA

Folsom, CA

#8 Jul 23, 2007
I have a 99 Chevy Blazer s10 2wd that needs a new 4.3L engine. What year engines can I use to put in mine?
confused

Columbia, MO

#9 Jun 3, 2008
i have found a 95 s 10 blazer with a 4.3 engine but the seller said he thinks the head gasket is needing replaced because it has alittle white smoke out the exhaust he says it use's no oil. the exterior and interior ,paint all looks great has about 160,000 miles on it has about 60% rubber on it he is asking 1250.00 for it does this sound reasonable on the price or is this going to cost more to fix than it would be worth.this is a 4x4 also. thanks for your advice
ray

Casnovia, MI

#10 Jul 14, 2008
its a bad set of injectors under the intake youll find a spider line with ALL not just one can be replaced change it
ShadowHawk

Plano, TX

#12 Aug 4, 2008
I *COMPLEELY* agree with the injector spider kit being the culpret.

You can change this yourself for about $309.00 - and about 2 hours of your time.

I've had to replace mine 2x - once because the fuel pressure regulator was leaking & it was flooding the engine on the passenger side...

Second time, one of the injector poppets was stuck open & flooding a cylinder.

I'd bet dollars to donuts - that replacing that will fix your described problem.

'95 S10 Blazer 2WD, 4-Door
musky321

Auburn Hills, MI

#13 Oct 6, 2008
Have you replaced this engine yet? There are some other things you can try, but you have to find the leak. send me a e-mail at musky321@live.com and I will try to help you. Dennis
T Ross- PA wrote:
Motor City Madman
Thanks for your response you were the only reply out of about six different forums
How hard is it to pull this engine. anything else i should look for that could be damaged frim the freeze other than the block, from the engine back.
I found an engine out of a 1991 Chevy blazer 4.3 V6 it has fuel injection and mine is carb will this work?
Thanks for your advice
joey

Casa Grande, AZ

#14 Dec 1, 2008
my 95 blazer 4x4 only goes 30miles a hour after parking it for the night any one have this trouble fills like the transmission only has two gears ran great till it was parked
oscar

Venice, FL

#15 Feb 5, 2009
Jim n Va wrote:
Just had remanufactured engine put in recently and having problems. Engine seems to have a steady miss at idle and hesitates when driving at any speed. Feels like a vacuum leak but cannot locate one. Have new plugs, wires, dist. cap, and some new sensors. Engine light not coming on so no codes. Almost no power after take off. Drinking gas like crazy!! Any suggestions on what may be the problem? Has been running ok until past few days.
There is a small vacuum line behind your intake, near the distributer. See if it is cracked. Mine was.
oscar

Venice, FL

#16 Feb 5, 2009
There is a small vacuum line behind your intake. See if it is cracked. Mine was.
chou

Saint Paul, MN

#17 May 2, 2009
i replace new fuel pressure regulator,fuel filter,battery spark plugs,n spark plug wires. everything work out well car started great everything seem 2 b ok.i parked my chevrolet blazer 95 over winter waiting 2 drive out n the spring.i haven't started the car up ever since when it was bout 2 b winter but n the middle of winter i try starting up my car n c if it would start but it have hard time starting on that moment.i start the car again n again it sounded like it was bout 2 start.i try n try jux 2start up my car n finally my car start up,the engine was running so i let it run 4 a while.i try startin up my car the next day,it has no hard time starting the car. then i haven't started my car since.spring i try startin my car again if it start n try it a few time but it kept sounded like its was going 2 startup but it won't start.i try again,the car sounded like its bout 2start then crank sound then the car when quiet i started it up again now i only hear a crank then the car went quie
sahan32000

London, UK

#18 May 26, 2009
hi i'v astro 4.3 w cpi with mpg about 8 can any one help
fixitjohn

United States

#19 Aug 13, 2009
94 s10 blazer shut off won't start back up can hear fuel pump runing have spark but won't start not getting any gas
Ronj

Bend, OR

#20 Aug 24, 2009
95s10 blazer - fuel pump not working - where is the fuse for this?
kris

Cleveland, OH

#21 Sep 10, 2009
hey i got a code for a secondary air injection problem can you tell me how to fix it

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