Last post on May 10, 2013 at 1:58 PM
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Chevrolet Blazer, GMC Jimmy, SUV
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#2393 of 3674 Re: 1997 GMC Jimmy AC problems [bntappleby]
Jun 22, 2006 (3:15 am)
The selector on the dash goes to a vacuum operated driver that moves a door in the heater box so would look behind the glove box and see if the vac lines are connected to it and then a few metal rods move and could be stuck or disconnected. Models differ and some use a cable not vac and climate control ones (temps marked on selector and auto settings) also have an electric blend motor on the heater box. Any AC shop should be able to fix this.
#2394 of 3674 96 s10 blazer starting issue
Jun 22, 2006 (4:32 am)
A couple of weeks ago my blazer got to where some times it would take several turns before it would start. It got better, then worse. Most recently it took about 6 turns. Today it quit all together and when I tried to turn it over it clicked several clicks. It did this several times. 25 minutes later it started fine. I've heard everything from starter to fuel filter to battery cable. Any guesses?
#2395 of 3674 Re: 96 s10 blazer starting issue [kmbsinkhorn]
Jun 22, 2006 (11:32 am)
Would test the battery first - sounds like its dying or has lost a cell so take it to an auto store and they will load test free. Is the alternator still charging (13-14V on the gauge) and store can test free too. If those 2 are good then same store should see a high current draw when you start and pinpoint the starter. If starter is going the bearings/bushings wear down and the armature drops and if you give it a good rap with a hammer (3 lb one) and it then starts - its starter time.
#2396 of 3674 92 s-10 blazer irractic idle and stalling
Jun 23, 2006 (12:04 pm)
i have a 92 s-10 blazer 4.3L 6cyl that seems to idle irractically and will stall at full stops (only some times). sounds fine during acceleration. the vehical responds the same whether hot or cold. We have replaced the plugs, wires, map sensor, fuel filter, air filter and egr valve. we have NOT replaced the O2 sensors yet. nothing seemed to help except the map and egr and that was only temporary. someone suggested cleaning the maf sensor, but i don't know where this is or how it should be cleaned.
we also get heat coming out from the floor vent with the a/c and heat off. is this from the climate control or heater core? there was another post with gurgling and i wasn't sure if the issues are related? we are planning to replace the digital dash, so it would be a good time for the heater core anyways...
#2397 of 3674 96 s10 blazer hard starting
Jun 23, 2006 (6:08 pm)
I have a 96 chevy blazer with the 4.3 vortex v6, and after getting my fuel injectors cleaned, the truck started great and ran good for 2 weeks, now it all of a sudden it takes a couple of cranks to get the truck to start, after it does it runs fine, but when it does start from the back of the truck it seems like its running rich from the fuel you can smell from the cranking. also if you shut the truck off and start it again it will start fine, but if you let it sit awhile, you have to crank it like up to six or seven times to start again. any ideas? is it a fuel regulator that is not holding back the fuel on start up?
thxs for any help
#2398 of 3674 Re: 92 s-10 blazer irractic idle and stalling [ladydemonsia]
Jun 24, 2006 (3:22 am)
You don't have a MAF - you got the older model with the map - any codes on - SES or check engine light on? Did you repkace the cap/rotor too I hope. The older CPI injection can leak under the intake and may require replacement (search above and many posts) but you should be smelling a heavier gas small than normal - look on the dip stick too and smell that for gas. Check fuel pressure cause low will cause bed idle or be related to the CPI.
Believe the older model have a heater control valve in the line in the engine compartment that may be frozen on allowing hot coolant to always circulate (nwer models do not have this - always flows).
#2399 of 3674 Re: 96 s10 blazer hard starting [jnkraab]
Jun 24, 2006 (3:32 am)
Check the fuel pressure - requires 60 psi cold start and 54psi to run. Possible that the cleaning damaged the regulator or injector poppets - cheap design with mostly plastic parts. As for the cranking - have to ask but how is the battery and alternator - get them tested at the local auto shop its free and a failing battery/alt can cause many problems on Blazers with a lower voltage. Don't assume fuel only. In hot climates I only get 3 years from a 3 year full warranty battery so been there often. Alts average about 60-80k as norm on Blazers too.
#2400 of 3674 Re: 96 s10 blazer hard starting [repairdog]
Jun 24, 2006 (8:49 am)
the battery is 6 months old and alt is 1 year old, battery cables were replaced 2 summers ago...this morning the truck started better on 2 cranks to go but still seems harder to start then normal..is there any way to know if its the regulator or poppets? or should i replace both?...also the poppets, are they the injectors or part of them and can i buy these parts seperate and are they hard to replace?
#2401 of 3674 Re: 96 s10 blazer hard starting [jnkraab]
Jun 25, 2006 (4:16 am)
Check the fuel pressure first if thats the orginal fuel pump. The CSFI system has 6 separate injectors each a plastic tube with a small poppet or injector on the end that clip into the intake under that plastic upper intake cover - these are fed by the central assembly or spider that has the regulator and the electronics that distributes the fuel - the fuel rail is bolted into this (see the 2 metal lines from the rear of the engine) and this has a test port to check the pressure. Each piece is not cheap but if this turns out to be bad GM now has a new replacement system called MFI that bolts right in and replaces the whole mess as one piece (redesign). Search the internet on this and you'll find the system - not allowed to get other links on this forum and the article is in pdf so can't paste it.
#2402 of 3674 98 Chevy Blazer will not start
Jun 25, 2006 (8:03 am)
Original Post: (2382)
Vehicle stopped running while moving down highway. Attempted to restart and will not. Battery just replaced. When attempting to start the engine vibrates/shimmys like crazy. Thought it was the timing chain...checked it and it looks good.
Update: Installed new fuel filter still won't start.
Observed another thing when attempting to start: When Key is in On Position Gas guage shows full and when attempting to start (turning engine over) the gas gauge shows empty.
Is this the on-board computer giving a hint or code as to what's wrong?