IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: shmed on September 11 2014, 04:52:43 PM
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ok the 4.1 is all back together fired it up an shook like it was having a seizure??? did run terribly tho...
then it shut off ok checked a few thing fixed a few wires that were wrong start up right away still shaking with this exhaust type leak sound then bang backfire and it shut down. try to restart an nothing but the sound of the new starter struggling.???
so far I checked the wires there on correctly
all the sensors are plugged in except the two on the intake coolant ones (broken)
took off the cam sensor cap its all tight an the reluctor is screwed tight??
any ideas>
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Crank sensor got smacked by the reluctor ring?
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That wouldn't make the starter struggle though. Might not be a bad idea to pop the plugs out and verify the engine turns over smoothy (for two full loops)
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Double check your cam sensor. I put mine in at 3:30 in the morning and accidently put the cap on 360' out. Car started fine when cold put really hesitated when warm, similar to what you described, pulled a lot of amps on the starter.
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Double check your cam sensor. I put mine in at 3:30 in the morning and accidently put the cap on 360' out. Car started fine when cold put really hesitated when warm, similar to what you described, pulled a lot of amps on the starter.
360 degrees out, you say? :chin: :hmm :player:
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Double check your cam sensor. I put mine in at 3:30 in the morning and accidently put the cap on 360' out. Car started fine when cold put really hesitated when warm, similar to what you described, pulled a lot of amps on the starter.
360 degrees out, you say? :chin: :hmm :player:
Divided by 2!
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ok earl did as you suggested pulled plugs turned over no problem.. no funny noises nada
ok took a look at teh crank sensor ane it appears to have been rubbing on the inside on the ring hopefully this is the problem
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If it's not the crank sensor (which when mine was rubbing about a year ago it ran fine but had a ticking sound that drove me crazy finding it) the big Backfire could be Timing Chain related but I hope that's not your issue. I sheared about 3-4 teeth off my crank sprocket years back & my car ran like yours when you say Shuttered. I hope it's something simple for you since the car has very little run time.
Is it possible you have 2 spark plug wires mixed up? When I did it ran like Crap & was hard to start!
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ok it now starts....BUT>........ it wont idle or keep running starts an dies unless i keep on the throttle...
if i unplug the maf it runs longer but still stalls.
ideas?
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Did you disturb the IAC?
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ok it now starts....BUT>........ it wont idle or keep running starts an dies unless i keep on the throttle...
if i unplug the maf it runs longer but still stalls.
ideas?
Almost sounds like something I did a year ago. I had the MAF pipe off...for some reason. I somehow plugged the 3 to 5 pin connector in upside down on my Z06 MAF when reinstalling. Did the same thing your car is doing.
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thanks bum but I'm running a stock maf still. i did swap it it out for a now one i had laying around with no change.
i did the iac reset thing no change, but does the iac number on the scan master continuously change or should it be a certain number an stay there?
this one was jumping 10 30 25 15 etc?
i did hold the throttle till the car was fully warm 160+ an it idled on its own but i noticed my wide band would swing from 0 to maxed out an back again as well as the vac gauge 10 15 20 0 etc
I'm starting to think theres a vac leak but i don't hear any kind of air movement noise/>
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My IAC numbers are around 30-40 & some days they hang aver 60+ but the car always runs the same. Lately it's been more in the 30's but I don't find any difference & if I didn't see the numbers on SM I would have no idea if they were Normal or High?
Any of the plugs look like they are burning different than the rest?
More specific answer to your question is the Numbers start high (around 100) then slowly get lower as engine temp comes up & AC is Off & your in Park. They will change in Drive so they are not Locked On a value yours seem in the correct range. Steve has a link on his site but I don't think there is much else to IAC numbers?
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thanks bum but I'm running a stock maf still. i did swap it it out for a now one i had laying around with no change.
i did the iac reset thing no change, but does the iac number on the scan master continuously change or should it be a certain number an stay there?
this one was jumping 10 30 25 15 etc?
i did hold the throttle till the car was fully warm 160+ an it idled on its own but i noticed my wide band would swing from 0 to maxed out an back again as well as the vac gauge 10 15 20 0 etc
I'm starting to think theres a vac leak but i don't hear any kind of air movement noise/>
Any codes on the SM?
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no mal codes bum
tonight i switched out the iac from my car into this one why ? why not
an didn't change a thing... fires up shuts down instantly...
wtf
the plugs all look the same,
ideas I'm at a loss now
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Are you getting a MAF signal to the ECM? Mine did the same thing one time. Start up and then immediately quit. I found that I had forgot to reconnect the translator
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Fires up & shuts down. Do you have a fuel pressure guage?
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thanks for the tips fellows
turned out to be a large vac leak....
my helper tried to reuse the plenum gasket that was broken an failed to tell me how he overtightened the bolts.
long story short its runs aren't kids great
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Hey, just helps you hone your troubleshootin g skillz. Great you got it worked out.