please help i'm stuck

[deercrusher]

Today I tried to I start the sho and see how it ran again - and noticed that it doesn't want to start. I hit the fuel pedal a little while cranking and it fires. Then it idles sooooo low it will stall unless I rev it. BUT - when i blip the throttle to around 2500 rpms - the tach jumps all the way to 8k. The engine doesn't rev any higher than what I am trying to - but tach jumps to 8k and holds there for about 2 seconds, even though I had let off the gas completely. Engine wasn't reving but tach said it was - then I blip'd the trottle to around 1500 and the tach jumped to zero - let off the throttle and it showed about 1k and then died since I wasn't hitting it anymore. What could cause this ?

There are no accessory pulleys on the motor - just wanted to see how it ran. The original DIS was bad - replaced with my DIS and it fired up, but runs like crap, when I put the crossover tube (with the DIS on) -the bolt that is closest to the firewall that holds it on snapped (so maybe a bad ground?) Could that shutter wheel on the cam sensor being 180 degrees off cause these symptoms?

 

[Sho_Freak]

man i dont know what to tell ya? maybe your replacemnt DIS is bad?

 

[NEp8ntballer]

the tach gets a signal from the cam position sensor so I'd start there.

 

[warmonger]

dis NEEDS a good ground,i'd check that and cps

 

[Bob Gervais]

Today I tried to I start the sho and see how it ran again - and noticed that it doesn't want to start. I hit the fuel pedal a little while cranking and it fires. Then it idles sooooo low it will stall unless I rev it. BUT - when i blip the throttle to around 2500 rpms - the tach jumps all the way to 8k. The engine doesn't rev any higher than what I am trying to - but tach jumps to 8k and holds there for about 2 seconds, even though I had let off the gas completely. Engine wasn't reving but tach said it was - then I blip'd the trottle to around 1500 and the tach jumped to zero - let off the throttle and it showed about 1k and then died since I wasn't hitting it anymore. What could cause this ?

There are no accessory pulleys on the motor - just wanted to see how it ran. The original DIS was bad - replaced with my DIS and it fired up, but runs like crap, when I put the crossover tube (with the DIS on) -the bolt that is closest to the firewall that holds it on snapped (so maybe a bad ground?) Could that shutter wheel on the cam sensor being 180 degrees off cause these symptoms?

Fix the broken bolt, as mentioned a good ground path is needed. Also, how did you manage to install the shutter wheel 180 out? The holes are offset so this can't happen.

 

[sperold]

The bolt that snapped off is the one that really matters, repair that and get back your good ground, and it will be OK. Look at all the ground straps associated with your intake.

 

[deercrusher]

wheel isn't necessarily installed 180 degrees wrong - just thought it was a possibility. I WILL fix that bolt - gotta get a bolt extractor. I have extra bolts for the crossover tube to the manifold but first gotta get the stub out. I will let you know the results when It's finished - thank you. One bolt is in - other one snapped off - didn't realize that one bolt being snapped could effect the DIS so much - but that's why this forum is invaluable to me. Thanks again for the help everyone.

 

[Off Road SHO]

If it's one of the two that hold the bracket onto the rear tank, your ground path wont be compromised. But if it's the single bolt that holds the crossover tube to the bracket, you've lost the solid ground that the DIS needs to function correctly. You could temporarily run a ground wire of any guage from the FRONT bolt of the crossover tube to the negative post of the battery to get you by.

Tom

 

[SHOspazz92]

If it's one of the two that hold the bracket onto the rear tank, your ground path wont be compromised. But if it's the single bolt that holds the crossover tube to the bracket, you've lost the solid ground that the DIS needs to function correctly. You could temporarily run a ground wire of any guage from the FRONT bolt of the crossover tube to the negative post of the battery to get you by.

Tom

What he said, I remember when replacing a Fuel line on Ashley's car that I did not bolt down the crossover tube. It was just temporary to see how the car ran and if the Fix had worked. It would not crank over. I leaned on the crossover tube while she was trying to start it and fired right up (Pushing the Crossover on to the bracket), When I got off it died. It still took me a few minutes to make the connection.

-Sam

 

[Off Road SHO]

The DIS bone's mounting/grounding screws are connected to the Crossover tube bone...

the Crossover tube bone's connected to the Crossover tube bracket bone...

the Crossover tube bracket bone's connected to the rear plenum bone...

the rear plenum bone's connected to the rear plenum support stud bone...

the rear plenum support stud bone's connected to the braided strap bone...

the braided strap bone's connected to the firewall bone...

the firewall bone's connected to the inner fender bone...

the inner fender bone's connected to the battery's negative post bone...



And that makes the whole thing work.

My sincerest apologies to whomever did the original "Bone" song.

Tom (high after a 10 mile bike ride and a Starbuck's coffee)

 

[deercrusher]

well here's the update as promised - if you don't want to read all of this it runs BEAUTIFULLY well now. Put the old cam sensor on as a shot in the dark - that is all. Started it up ran like CRAP - nothing different. I let it run for 1 minute. Didn't want to run it longer (there are no accessory pulleys on the motor - water pump, alternator -etc...) Shut it off - checked over everything - and again changed nothing.... Started it up again - ran for about 15 seconds and heard a pop - very similar to the sound of the pop firecrackers that you can throw at people - same tone and pitch but a little louder. Then - idled nice and smooth - took it to 3k rpms - still sooo smooth. Don't know what the problem was but it runs great now - coincidence with the cam sensor? Maybe had something in the engine blocking something? Car sat for 2 years before I bought it - I dunno. But it's good now. Thank you all - I was getting to the point where I was going to just drop my other motor out of my old sho and do a motor swap.

 

[deercrusher]

Running GOOD now!!!!

well here's the update as promised - if you don't want to read all of this it runs BEAUTIFULLY well now. Put the old cam sensor on as a shot in the dark - that is all. Started it up ran like CRAP - nothing different. I let it run for 1 minute. Didn't want to run it longer (there are no accessory pulleys on the motor - water pump, alternator -etc...) Shut it off - checked over everything - and again changed nothing.... Started it up again - ran for about 15 seconds and heard a pop - very similar to the sound of the pop firecrackers that you can throw at people - same tone and pitch but a little louder. Then - idled nice and smooth - took it to 3k rpms - still sooo smooth. Don't know what the problem was but it runs great now - coincidence with the cam sensor? Maybe had something in the engine blocking something? Car sat for 2 years before I bought it - I dunno. But it's good now. Thank you all - I was getting to the point where I was going to just drop my other motor out of my old sho and do a motor swap.:woo-hoo::thankyou: ooooops double posted - so happy.

 

[Bob Gervais]

The DIS bone's mounting/grounding screws are connected to the Crossover tube bone...

the Crossover tube bone's connected to the Crossover tube bracket bone...

the Crossover tube bracket bone's connected to the rear plenum bone...

the rear plenum bone's connected to the rear plenum support stud bone...

the rear plenum support stud bone's connected to the braided strap bone...

the braided strap bone's connected to the firewall bone...

the firewall bone's connected to the inner fender bone...

the inner fender bone's connected to the battery's negative post bone...



And that makes the whole thing work.

My sincerest apologies to whomever did the original "Bone" song.

Tom (high after a 10 mile bike ride and a Starbuck's coffee)

This post is just screaming for rainbow stickers and a little bedazzling.

 

[deercrusher]

:gayroll:

 

[deercrusher]

thanks for gayin up the thread!

 

[Off Road SHO]

This post is just screaming for rainbow stickers and a little bedazzling.

You guys just aren't old enough to remember that song. Don't be hatin on us old guys for memberin. I can't even remember who did it originally, maybe Perry Como?

Anyway, ground that DIS.

Tom

 

[deercrusher]

will do old man and I thank you for the WISE advice.

 

[deercrusher]

update

here's another update on where I stand on redoing the Sho that I bought a little while ago. On top of what you read above - didn't want to start another thread wasting space - Now I have to do the oil pan gasket. I was going to put everything back together tonight but - I shined my flashlight down behind the crank sprocket and saw oil laying in the lip. At first I thought I messed up the crank seal when I installed it - but after taking everything back off - I looked closely and saw NO oil laying in the area right below the crank - it was only on the lip that extends outward from the oil pan - and saw the oil pan gasket was weeping. So now I have to do that too