You are here: Forums SUVs Chevrolet Blazer Chevrolet Blazer Engine and Performance Problems

Chevrolet Blazer Engine and Performance Problems

142 messages,  Last post on Nov 11, 2009 at 9:09 PM

You are in the Chevrolet Blazer Forum. Your Hosts are steve_ & tidester

What is this discussion about? Chevrolet Blazer, SUV

Messages Page 8 of 15 1 ... 5 6 7 8 9 10 11 ... 15 Prev Next Last

Go To Msg # Search This Discussion

#68 of 142 Re: Vac Line problem [spencer03] by repairdog Apr 02, 2007 (3:14 am)
Replying to: spencer03 (Apr 01, 2007 3:25 pm) OK here we go. 1. Vac comes from underhood drivers side. Follow the vac line 5/32" from by the valve cover PCV over to the drivers side and replace rotted lines (all are) and to a vac reservior can in the fender (yes you can feel to put a new line on) and one Ts off to run down to the 3 port and the final plastic at the end is for the heater controls. 2. On the 3 port rubber connector if you look inside it you will see 3 holes/lines and a keyed position hole. With the keyed hole at the bottom of your view there are 2 lines above one on left is the VENT line one on right the VAC line from the engine. Then the third line at the peak of the triangle is to the front ACTUATOR line. 3. Straight lines from the vac and to the actuator. But that vent line is T to a transfer case vent line and then should run up the transmission dip stick secured by a tie and has a vent cap on it. 4. Another check is to look at the 3 port switch which then has 3 plastic line tubes/connectore and a fixed plastic pole as the keyed position (of the rubber to line up). Looking down on the top of this 3 port switch the vac is on the left, the vent on the right, and the top of the triangle line is the actuator. Thats it - take your time and it should work. I would change that switch anyway while under there so if any problems rules that out up front.
#70 of 142 98 Blazer steady speed it Misfires by doc_john_13 Apr 30, 2006 (2:17 pm)
Hello, I have a 1998 Chevy Blazer. The Idle is fine, the acceleration is fine. But when you get it up to a steady speed it Misfires. I have changed spark plugs, and plug wires. Replaced the fuel filter. Ran injector cleaner time and time again.   I don't know what else to do. Can you PLEASE help me? thank's John Replies to this message: tidester (Apr 30, 2006 6:56 pm) waynediehl (Jan 03, 2007 8:01 pm) repairdog (Jan 04, 2007 2:26 am)
#71 of 142 Re: 98 Blazer steady speed it Misfires [doc_john_13] by tidester HOST Apr 30, 2006 (6:56 pm)
Replying to: doc_john_13 (Apr 30, 2006 2:17 pm) You'll have a far better chance of getting help if you post your message where other Blazer owner's will read it. You can find them here: Chevy Blazer/GMC Jimmy: Problems & Solutions   tidester, host
#73 of 142 Re: 98 Blazer steady speed it Misfires [doc_john_13] by waynediehl Jan 03, 2007 (8:01 pm)
Replying to: doc_john_13 (Apr 30, 2006 2:17 pm) Hi i had the same problem with my truck then it started poping codes saying a muti port misfire. I went to a shop. They told me it was my injectors. I did not think that was right so i tried acouple of things. There is a controll module in the distributer it cost about 40 dollers and after i changed that the problem went away. But the damege was done it fried my cat I cant remember what the part was called. But you can ask your local parts store. P.S my motor is a 4.3 L v6 with the delpi system. Anyway good luck hope it helps. Replies to this message: repairdog (Jan 04, 2007 2:26 am)
#74 of 142 Re: 98 Blazer steady speed it Misfires [waynediehl] by repairdog Jan 04, 2007 (2:26 am)
Replying to: waynediehl (Jan 03, 2007 8:01 pm) Must have been the cam position sensor in the distributor. Ignition module is mounted on the coil on newer models. The random misfire P0300 can be injectors, cap/rotor, coil, ign mod, vac leak, and a few others so this is way a good dealer scan can save you money - if they can actually spot the cause - some never pop a code and only occur at certain throttle conditions. Mine was a crank sensor that threw timing off so at full throttle leaned the fuel mix out and misfires in all cylinders. So a lean mixture due to failing fuel pump can also cause this. Good you found it.
#75 of 142 Engine missfire by bladeturner Feb 22, 2007 (11:10 pm)
My 99 S-10 Blazer engine missfires (4.3liter tbi) when cold but runs great when warmed up. One shop said this is caused by the ECM. No codes showing and all sensors checked good. Milage is 204,000+ Please help!! Replies to this message: repairdog (Feb 24, 2007 3:56 am)
#76 of 142 Engine misfire by lynderae Feb 23, 2007 (9:47 pm)
Did you have to pull the whole distibutor. If not how do you get the module from under the metal piece? I pulled the rotor and the piece is directly under it. I removed the screws in the module but it wont slip out Replies to this message: repairdog (Feb 24, 2007 3:52 am)
#77 of 142 Re: Engine misfire [lynderae] by repairdog Feb 24, 2007 (3:52 am)
Replying to: lynderae (Feb 23, 2007 9:47 pm) same as other posts answer.

Messages Page 8 of 15 1 ... 5 6 7 8 9 10 11 ... 15 Prev Next Last

Go To Msg # Search This Discussion

You are here: Forums SUVs Chevrolet Blazer Chevrolet Blazer Engine and Performance Problems