I just got done putting the upper intake on so i could move it to the other side of town, now its not getting any spark to the plugs, i double checked everything and everything is plugged in, the coil looks newer and the plugs are new. It sat for about two weeks before i put the intake back on, so possibly corrosion?
93 SHO 3.2 Auto-no spark
- Thread starter 343AMX
- Start date
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hawkeye18
Sorta cares
A few things to check:
1) Is the crossover tube bolted TIGHT to the rest of the intake? A tight connection is crucial.
2) Is the DIS bolted TIGHT to the crossover tube? Especially the two bottom bolts? I ask because these two bolts, as well as 1), are the ground path for the DIS. If it is absent, or weak, there will be no spark.
3) Have you checked ALL the ground straps? There are two of concern: the one to the battery's negative terminal, and the one large strap to the bolt that holds the passenger side rear intake support bracket on. If either of these are weak or missing, you guess it - no spark.
1) Is the crossover tube bolted TIGHT to the rest of the intake? A tight connection is crucial.
2) Is the DIS bolted TIGHT to the crossover tube? Especially the two bottom bolts? I ask because these two bolts, as well as 1), are the ground path for the DIS. If it is absent, or weak, there will be no spark.
3) Have you checked ALL the ground straps? There are two of concern: the one to the battery's negative terminal, and the one large strap to the bolt that holds the passenger side rear intake support bracket on. If either of these are weak or missing, you guess it - no spark.
38SHO
#1 Oil Abuser
yeah the crossover tube has two spots for it for brackets on the front side and back side, both will bolt onto the actual intake manifold
couple things to note
I just have one bracket on mine, the front one, because I couldn't get the other ones to lign up.... also my car never did have that ground strap from the back side bracket bolt that goes to the firewall I believe............ PO must have removed it
the entire engine is grounded though, so you need a few things to check here
the main negative cable off the battery should goto a stud with a nut on the bellhousing or starter area.... mine is a MTX, yours might be slightly different, but same principle
a direct cable from battery to metal part of engine.... now anything that is metal, directly touching that part of metal will be grounded.... this makes the transmission grounded, the engine block, heads, and conesquently works its way to the intake manifold runners...
on my MTX, there are two wires comming off the battery negative terminal... one that goes to the engine, and another smaller one that goes into a ford type connector next to the battery... if u have that make sure it is plugged in... I would assume this goes to the chassis/cabin area to ground it.....
make sure all connections are clean, from battery posts, terminals, cable ends, then look at the part of the cable that attaches to the bolts... it should be shiny, scuff it up, sand it whatever... I take an abrasive pad to mine on my air powered grinder. make sure the bolt that secures the cable on, the face of it where it touches the terminal should be shiny as well.... this promotes good ground transferring....
make sure all bolts/terminals associated with the cable are tight, battery included
everything that is touching and transferring the ground should have good contact, shiny, tight.. metal on metal... this includes the bolts and brackets the hold the crossover tube on..........
I can almost gurantee you something like this, or something missing, is what is causing your problem......... also be certain you didn't do something emberassing... we've all done it.. like forget to plug a connector back on... there aren't any real ingnition related plugs from the intake besides the DIS.... but who knows what you took off so just double check atleast everything ignition related..... I also assume you didn't take off the plug wires? although they are fairly easy to figure out what goes where unless you took them off the coil all at the same time....
couple things to note
I just have one bracket on mine, the front one, because I couldn't get the other ones to lign up.... also my car never did have that ground strap from the back side bracket bolt that goes to the firewall I believe............ PO must have removed it
the entire engine is grounded though, so you need a few things to check here
the main negative cable off the battery should goto a stud with a nut on the bellhousing or starter area.... mine is a MTX, yours might be slightly different, but same principle
a direct cable from battery to metal part of engine.... now anything that is metal, directly touching that part of metal will be grounded.... this makes the transmission grounded, the engine block, heads, and conesquently works its way to the intake manifold runners...
on my MTX, there are two wires comming off the battery negative terminal... one that goes to the engine, and another smaller one that goes into a ford type connector next to the battery... if u have that make sure it is plugged in... I would assume this goes to the chassis/cabin area to ground it.....
make sure all connections are clean, from battery posts, terminals, cable ends, then look at the part of the cable that attaches to the bolts... it should be shiny, scuff it up, sand it whatever... I take an abrasive pad to mine on my air powered grinder. make sure the bolt that secures the cable on, the face of it where it touches the terminal should be shiny as well.... this promotes good ground transferring....
make sure all bolts/terminals associated with the cable are tight, battery included
everything that is touching and transferring the ground should have good contact, shiny, tight.. metal on metal... this includes the bolts and brackets the hold the crossover tube on..........
I can almost gurantee you something like this, or something missing, is what is causing your problem......... also be certain you didn't do something emberassing... we've all done it.. like forget to plug a connector back on... there aren't any real ingnition related plugs from the intake besides the DIS.... but who knows what you took off so just double check atleast everything ignition related..... I also assume you didn't take off the plug wires? although they are fairly easy to figure out what goes where unless you took them off the coil all at the same time....
Ok, i torqued everything on the intake down to the repair manual's spec torques, tightened all of the clamps as tight as they will go, and checked hopefully all of the ground straps i could see tight. And still no spark, i tried my other DIS module and still nothing.
38SHO
#1 Oil Abuser
do you know how to check for codes?
38SHO
#1 Oil Abuser
you don't need that
here
http://www.shophoenixproject.com/eec/eec.htm
this site has a lot of other stuff on it too.... if u don't know about this site you will find it invaluable...
since it won't start you will only be able to do the KOEO... Key On Engine Off codes... but if u have a sensor problem that throws a code it should still show up
here
http://www.shophoenixproject.com/eec/eec.htm
this site has a lot of other stuff on it too.... if u don't know about this site you will find it invaluable...
since it won't start you will only be able to do the KOEO... Key On Engine Off codes... but if u have a sensor problem that throws a code it should still show up
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luigisho
SHO Member
If it had spark when you took the intake off and the battery is charged then it's either the ground strap or the DIS is not grounded. Make sure all the bolts are there and the ones at the top of the intake near the DIS are all installed. The DIS is likely not grounded.
Tomrrow im going to go through the entire upper end of connections and grounds, if i have to ill pull the intake off again, and i have an extra DIS module ill try and see if that might be the problem but now im running out of ideas.
38SHO
#1 Oil Abuser
yeah man weve damn near all had this type of problem before lol
its a bolt or bracket or some wire.... something really stupid thats easy to overlook, and when u find it you'd have no idea something like that would keep a car from starting
its a bolt or bracket or some wire.... something really stupid thats easy to overlook, and when u find it you'd have no idea something like that would keep a car from starting
luigisho
SHO Member
Could be the DIS module but the module itself is grounded by bolts on the intake that you wouldn't associate with the module. It can be aggravating. Good luck.
38SHO
#1 Oil Abuser
u do have all 4 bolts into the dis module correct? I left one out onetime cause I was doing a test on it and it wouldn't fire until I put the other bolt on........
Well i tried the other DIS module and still nothing, i have the front intake brackets bolted on tight but still nothing, the rears wont fit, i do have the ground strap bolted onto it though. All of the DIS Module bolts are in and tight, i cleaned the surface up to get a better gound but you guessed it, still nothing so im gonna go grab a DIS module from my buddy's car and see if thats the problem.
hawkeye18
Sorta cares
told you!
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