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Chevrolet Blazer Engine and Performance Problems

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Comments

  • Concerning your problem i am having the exact same. Plus one of my oil lines coming out of the radiator is leaking like a stuck pig. Where did you order the hose from and how much was it?
  • jlflemmonsjlflemmons Posts: 2,240
    The oil lines can be purchased at NAPA, O'Reilly's, and most other national parts store chains. NAPA cost is around $50.
  • Hi Guys and Gals
    I have a 1997 Blazer 2DR 4X4. I bought it about 1 mo ago and have had nothing but problems. My biggest problem is I cant seem to get it inspected. I have over 200 miles on it since I replaced the battery but when the Mech Hooks up the "DREADED" computer all we get is a reading that says Not Ready To Read. any suggestions? If I cant get it inspected I cant use it. I do have some small electric problems IE:
    My compass is backwards, my fuel gauge doesnt work, and I dont believe my temp gauge is working.

    Thanks

    Steve
  • punkeypunkey Posts: 1
    edited February 2010
    I am new to this forum so hello to all. I have been reading several problems with surging around 1000 to 1500 rpm. My blazer is a copy-cat. Seems that when it desides it wants to, it will jump back and forth. It doesn't matter what gear I have it in. I have tried it in 3rd and it continues just as it did in overdrive. What have you all found to have helped your problem. Thanks!

    Keith
  • My 93 blazer is doing the same thing. I was tiold to change the distributer cap and rotor. Didn't solve the problem. The shift light blinks on and off when shifting andf when driving, and it feels like the motor wants to stall. Somedays I have no problem and the truck runs fine. I'm lost to as what is going on, could someone please help me out. thank you,,John
  • fireman14fireman14 Posts: 1
    edited March 2010
    On take off and normal driving my blazer seems to stall or sputter then runs fine again. I have replaced the distributor cap, rotor button, plug wires, plugs, egr valve, fuel filter, and the mass air flow sensor. The only thing that has helped was the mass air flow but after driving a few days it starts acting up again. I have already replaced it again with same problem. Any help would be greatly appreciated. Thanks
  • coolincoolin Posts: 1
    edited April 2010
    My 98 Blazer does the same thing as yours. It's been running like this for 8 months. This moring, on my way to work, it sputter so hard I thought it was going to stall.

    It's to the point were I won't dart in front of traffic unless I have plenty of room. This way I won't interrupt the flow of traffic and get rear ending. I never know when it will sputter.

    I took it to a good repair shop and they cleaned off a sensor and it helped for a week, then it went back to the stalling/sputtering. I hope whatever the problem is it will be a cheap fix. I just spent $800 fixing something elese. I did not mention the stalling, I was still in shock from the $800 problem.
  • rfletcherrfletcher Posts: 24
    1991 S10 Blazer 4X4 4.3 L 187000 mi. Truck in excellent condition, used every day and normally runs very well. Intermittently, the engine dies, at any speed, without warning.. Will restart but may or may not stall again within a few minutes. May be heat related. After it sits for several hours, will operate perfectly for weeks or months. Problem started last fall. Replaced ignition control module, Dist. Cap, Rotor, Plugs etc. Replaced both temp. sensors . and oil pressure sensor. Fuel pressure was and still is normal.[ Had a qualified mech. check it again this week.] After all the "Easter Egging" last fall, did not fail again until March then again in April but ran perfectly until last week. Truck was in shop all day, with three mechs. driving and testing.. Can find nothing wrong.. No codes. Normal driving conditions are short trips with frequent stops. Has never failed . Each incident was on an 80 mile round trip. Forty miles over, no problem and sits for two hours. Forty miles back and has stalled up to six times at 65mph and / or in heavy traffic at very low speed. Will restart, usually very easy but occasionally, all but kills the battery. :confuse:

    It's driving me NUTS and not doing my pocket any favors either.

    Thanks for any suggestions
  • duntovduntov Posts: 133
    I think I may have covered this one before. Anyway, you should always use a conductive lube or paste on the ICM head sink in the distributor. Do not use dielectric grease or silicone greease such as SIL Glide. Dielectrice lube is a insulator. Always replace the two ICM moumnting screws also. They ground the ICM and can corrode due to moisture and electrolysis. Unfortunately, the monting screws are a dealer item, part no. 10469668. The heat sink paste is Arctic Silver 5. and can be purchased as any computer electronics store.

    The ICM is sensitive to heat and ground and will intermittenly fail when the heat is excessive there high resistance to ground. .
  • jlflemmonsjlflemmons Posts: 2,240
    Try applying a heat gun to the crankshaft position sensor. These will only set a code if the failure occurs three times without cycling the ignition. If weak, they tend to fail when hot, and at higher rpm. The unit is what's called a Hall Effect sensor. Reads the magnetic pulse from the crankshaft and will kill the engine if it doesn't "see" the pulse.
  • rfletcherrfletcher Posts: 24
    Thanks, I will certainly do as you suggest. I think a paste came with the new ICM but have no idea what it was. I had a gut feeling that it was heat related but not in this way.
  • rfletcherrfletcher Posts: 24
    Thanks for the help. I will check that too. Has never set a code but then the OBD1 dosn't read a lot. Seems the guys in the shop here lack your experience.
  • rfletcherrfletcher Posts: 24
    As you suggested, I pulled the ICM, cleaned all surfaces, and reinstalled it with the only silver product I could find. Holiday weekend. Today, in the very fine print I noticed this product, while claimed to be 99.9% pure silver and made for high power heat sinks, is not electrically conductive. Makes no sense but now I feel that I should pull it again. Your opinion.
  • duntovduntov Posts: 133
    Arctic Silver 5 is THERMALLY CONDUCTIVE, and was designed to conduct heat, not electricity. The heat sink for the ICM is designed to conduct heat away from the module and Arctic Silver 5 enhances that conductivity.

    New fasteners provide a good electrical ground for the ICM and should be replaced when the ICM is replaced.
  • rfletcherrfletcher Posts: 24
    I understand the thermal issue but misinterpreted your post as to electrical aspect of the paste because of the potential failure of the screws.. Turns out the paste from Radio Shack is in fact Arctic Silver 5 marketed under their label so I am good to go. Will see what happens. Thanks
  • zassoffzassoff Posts: 2
    i have a 95 chevy blazer that is running like i'm trying to burn pond water. i can pour sea foam in the tank and for a few days it clears up, and then back to the problem again. it also is, apparently, having vaccum problems. when it is running poorly, if i put it under a load ,such as going up a hill, the a/c will start to blow through the defrost ports. the brakes also feels like i'm stepping on a brick. it furthermore will start to overheat during this time-any suggestions?
  • rfletcherrfletcher Posts: 24
    Since post of 6 July have had no more stalling in traffic. Thanks duntov. Now,again intermittently, the engine will not start without WOT, but it will start, every time. Hot, cold, never know when it will occur. Following may or may not have to do with problem When it starts, vac is steady at 20 in. hot idle. WOT, momentary drop then rapid increase to 23 in. MAP test; KOEO, ref. voltage steady 5. Output term B 4.91. Hot idle output 1.45 / 1.503. Then the questionable appears. WOT [ vac as above] output drops to .923 then rises back to near idle values. Chilton book calls for rise to near 4.5. Have no idea how to interpret this. Also suspected EGR so did following; Can not see movement on this one so temp. connected vac pump in place of TBI. A small vac, 2 or3 in., caused engine to stumble, more vac, engine died. Found EGR solenoid inoperative. Very high resistance in coil. Applied 12 volts directly but no action. Again, have no clue what or if this means anything to starting problem. Of course these test would not account for a valve that is intermittently stuck slightly open. Prior to this the idle had become rough. Quite a lot of vibration, especially with AC on. This is also intermittent. Shop told me it was motor mounts. These are the same guys who could find no problem concerning the previous post.
  • Hi, does anyone know how to or can provide a diagram on how to replace the ignition module in the steering column. I looked when would not start and thought I fixed but when the column is tilted up it does not want to engage. Turn key and nothing. Lower column and it turns over. Any help would be greatly appreciated. Thanks
  • femekafemeka Posts: 2
    i have been useing my blazer for some years now ,but last two months i drive to a supermarket and parked after shoping wen i came back try to start the car but car denied to start after many hours i took it to workshop for two months electricains and mechanic could not not start my chev they have tryed to change the brian box, coil, sensors, but the problem still remian thesame, pls if there is any advice or help you can give i wil realy apreciate. please i need ur reply on this matter.
  • femekafemeka Posts: 2
    please i need ur help guys, my chev blazer 2000 model has serious problem it dosent start it only crank i have change brian box , coils , sensor, but the problem still remain thesame , there is normal flow of current from the brainbox to the coil but from the rutor to the coil there know current , i have change the plug wires, rutor cap , the problem remain thesame, please i need your help.
  • I have been having issues with my 1994 Chevy Blazer 5.7. I have had it tested by a shop and the codes that came up said my MAP sensor was having issues and it was running lean. I replaced the MAP sensor, EGR valve solenoid and it was no better. I was on the freeway the other day and my gas pedal sucked to the floor and the truck was accelerating. I turned the key off and back on but the engine was revving so high the truck never completely shut off but it did release the gas pedal. Why would this happen?
  • I have a 1994 and it is also doing this. I have replaced several things and the item that gave me the MOST improvment was replacing the PCV valve now It seems to do it much more in colder and not so much when it's warm. Still lost as to what the rest of the problem is
  • rx7420rx7420 Posts: 3
    sometimes it wont start when it does start it idles fine for a bit then when u put it in drive it will be ok then the rpms will surge to 1300 and at idle around 1800 and stay that way till i shut it off i thought maybe the idle control motor was bad so i replaced it and it didnt fix it any ideas
  • rx7420rx7420 Posts: 3
    hey my 95 blazer is kinda havein the same problem did u ever figure it out?
  • rfletcherrfletcher Posts: 24
    edited September 2012
    Blazer Sport 4X4 4.3l TBI 185000 miles. No trouble codes. Code 12 only. Has a long history of stalling at high speed, rough idle and poor gas mileage. Gave up on DIY. After four professional shops and more money than I care to think about, finally found the problem, or so I thought. Last shop found, inside, the throttle body totally encrusted with carbon. One vacuum port had to be drilled out. Cleaned body and installed overhaul kit including the fuel regulator and injectors. Replaced O2 sensor for the third time. Truck ran as new for a few weeks. Fuel consumption same as when new. Was never that great. Now: does not stall at high speed but does stall on rapid deceleration. Intermittent rough idle and poor gas mileage. In desperation, purchased an ALDL to USB interface for the laptop. Running WinALDL. Data scan indicates INT set to 128 as is normal for open loop. BLM counts from 0 to 256 then starts over. Do not know what this count means. O2 does not hunt. Never changes more than .465 to .570 during warm up. Temp. was a little low so changed sensor. Now 287F. No effect. All other sensors are normal. It appears to be stuck in open loop and running very rich. I am in over my head and treading water. Does any of this mean anything to anyone? Defective ECM? Defective wiring? Thanks to anyone and everyone.
  • When I start it some times the brake light stays on,fuel guage does'nt work, air bags warning lights on. I was thinking maybe ignition switch. I have a 2001 I just bought with a bunch of electrical problems. Is this pron to these models? I appreciate any help I can get. Thank you all.
  • I have a 2008 Trail Blazer that we purchased in April of 2009 with 8,000 miles on it. In 2010, at 51,000 the engine blew. GM refused to pay for it because they said it was "lack of maintenance", which is impossible as we have a Dodge with 320,000, a Honda with 275,000 and a Chrysler with 150,000 on them. They finally paid to have a new motor put in. In 2011, the exhaust manifold cracked just as a recall came out. GM replaced it with no problems. In 2012, at 121,000 miles, the exhaust manifold cracked again. GM refused to pay for it but I argued and argued because there was only 30,000 miles between them. They finally agreed to replace it if I signed a waiver stating they were not responsible for any further problems. Of course, I refused to do that. The recall was warranted to 120,000 miles anyway. We are now at 140,000 miles (89,000 on this motor) and it has a "bad head" in cylinder 3. The estimated repair is $4,000.00. GM again refuses to do anything. I'm initiating the attorney general and we are seriously considering a class action suit against GM, as this is such a common problem according to what research I've done. Please give me input on your issues if they are anything like ours. The more names I have for the class action suit, the better! Thank you!!
  • hello, i have a 96 chevy blazer 4.3 ive tried everything to get it to start it tries to start at 3/4 throttle but then quits can anyone give me an idea what the problem might be, it was running the just shut down on the hwy and havent been able to start it since then thank you

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