relocating Ign module?

[BoostedSUV]

I've been having hot start issues pretty much ever since I've had a typhoon. Engine gets up to temp, shut it off, try to restart it and it cranks tries to start once then will crank until the battery goes dead. The only way I can get it start is if I hold the throttle wide while cranking. It will start but 7/10 times it will throw a code 42 and the truck will run pig rich and I have to limp it around.

What I'm wondering is (just a thought) the ignition module is getting hot and acting up. Has anyone ever tried to mount it to the firewall to keep the heat off of it? From what I recall all I would have to do is extend the wires from the pickup to the module and the rest would be plug and play. Any thoughts? Anything else I should try. I should mention I have an MSD 6A and MSD billet dizzy. I'm going to do a the purple wire mod this week even though it cranks fine when hot.

 

[1madgumby]

Re: relocating the Ignition module?

Re: relocating the Ignition module?

sounds like the MSD 6a iis not providing enough spark. try going back to stock ING. & try it then. once the 6A gets warm it is not providing enough spark. Thats were I would start.

I've been having hot start issues pretty much ever since I've had a typhoon. Engine gets up to temp, shut it off, try to restart it and it cranks tries to start once then will crank until the battery goes dead. The only way I can get it start is if I hold the throttle wide while cranking. It will start but 7/10 times it will throw a code 42 and the truck will run pig rich and I have to limp it around.

What I'm wondering is (just a thought) the ignition module is getting hot and acting up. Has anyone ever tried to mount it to the firewall to keep the heat off of it? From what I recall all I would have to do is extend the wires from the pickup to the module and the rest would be plug and play. Any thoughts? Anything else I should try. I should mention I have an MSD 6A and MSD billet dizzy. I'm going to do a the purple wire mod this week even though it cranks fine when hot.

 

[BoostedSUV]

Re: relocating the Ignition module?

Re: relocating the Ignition module?

I had this problem before I had the MSD 6 installed. I actually put the MSD in hoping it would help. I've also tried different coils.

I tried datalogging while cranking when it's hot and the RPM on DM jumps to 6k and the injectors go to 100%

 

[1madgumby]

Re: relocating the Ignition module?

Re: relocating the Ignition module?

Ok, that goes back to the computer, did you try to put A new one in? might have A bad one, there known to take A crap.

I had this problem before I had the MSD 6 installed. I actually put the MSD in hoping it would help. I've also tried different coils.

I tried datalogging while cranking when it's hot and the RPM on DM jumps to 6k and the injectors go to 100%

 

[BoostedSUV]

Re: relocating the Ignition module?

Re: relocating the Ignition module?

Ok, that goes back to the computer, did you try to put A new one in? might have A bad one, there known to take A crap.

I have 2 ECM's and one is a new Reman one. Does it with both unfortunately. I don't remeber if it did with the stock memcal but it definitely does it with the G1 adapter and burned chip

 

[1madgumby]

Re: relocating the Ignition module?

Re: relocating the Ignition module?

Can you put A stocker chip in it? I would try that.

I have 2 ECM's and one is a new Reman one. Does it with both unfortunately. I don't remeber if it did with the stock memcal but it definitely does it with the G1 adapter and burned chip

 

[BoostedSUV]

Re: relocating the Ignition module?

Re: relocating the Ignition module?

Can you put A stocker chip in it? I would try that.

next time it's hot and wont start I'll try it with the stock chip but not sure what in the .bin or G1 adapter would cause that

 

[1madgumby]

Re: relocating the Ignition module?

Re: relocating the Ignition module?

Over heating will do it..

next time it's hot and wont start I'll try it with the stock chip but not sure what in the .bin or G1 adapter would cause that

 

[turboj91]

Re: relocating Ign module?

Follow the code 42. Bad ground within the EST circut or a bad module. Really should not need to move the module. They are tested in temps far exceeding what you are experiencing (even though your having cooling issues). Is it really pig rich (flooding) or just a very weak spark that won't burn the fuel. Since WOT shuts off the fuel flow, the combo of weak spark and a lean condition may be just enough to let it start, but once running, the return to "normal fuel flow" drowns out the weak spark and makes it seem rich. I have some other ideas, but I'd go here first. What does your data logging tell you when your cranking?

 

[BoostedSUV]

Re: relocating Ign module?

Follow the code 42. Bad ground within the EST circut or a bad module. Really should not need to move the module. They are tested in temps far exceeding what you are experiencing (even though your having cooling issues). Is it really pig rich (flooding) or just a very weak spark that won't burn the fuel. Since WOT shuts off the fuel flow, the combo of weak spark and a lean condition may be just enough to let it start, but once running, the return to "normal fuel flow" drowns out the weak spark and makes it seem rich. I have some other ideas, but I'd go here first. What does your data logging tell you when your cranking?

Jim I had this problem with my old Typhoon too when the engine was up to temp. Like shutting it off to get gas or something, it would give me a hard time restarting.

The code 42 pops up but when I shut it off and it starts normal the code is cleared. I have changed ignition modules a few times while chasing gremlins with the old truck. I can't remember if I had this issue with the stock dizzy but it definitely happens with the MSD billet dizzy.

DM shows the engine at 6,000 RPM's while cranking when it's hot and it just dumps fuel

 

[BoostedSUV]

Re: relocating Ign module?

took a screen shot of cranking with the engine hot. not the tps position, enging rpm, and injector DC. This is while cranking only when it wont start

 

[turboj91]

Re: relocating Ign module?

Holy crap, this problem followed you to this truck. I remember the 6K rpm issue from before. Have you logged a cold start? to see any differences.
The reference signal for rpm is getting f'd somewhere along the line and its down hill from there.
If it is in fact dumping fuel like there is no tomorrow, and you ran your battery down attempting to start, make sure you haven't washed fuel into the oil pan.
BTW, where is the battery in this truck?

 

[BoostedSUV]

Re: relocating Ign module?

Holy crap, this problem followed you to this truck. I remember the 6K rpm issue from before. Have you logged a cold start? to see any differences.
The reference signal for rpm is getting f'd somewhere along the line and its down hill from there.
If it is in fact dumping fuel like there is no tomorrow, and you ran your battery down attempting to start, make sure you haven't washed fuel into the oil pan.
BTW, where is the battery in this truck?

so far this is the only issue that has followed from the other truck luckily. This truck has the battery located in the back with 0 gauge power feed. All the proper grounds are accounted for

As far as starting it cold it's half a crank and fires right up so there's not much to log

 

[1madgumby]

Re: relocating Ign module?

I still think it is in the computer somewere.

took a screen shot of cranking with the engine hot. not the tps position, enging rpm, and injector DC. This is while cranking only when it wont start

 

[BoostedSUV]

Re: relocating Ign module?

Just a quick point!!! When you floor the gas pedal you are in clear flood mode. So clearly you are getting to much fuel. Now all you have to do is find out why.

This is definitely the case. When it finally starts it puffs un burned fuel out the exhaust like a mosquito fogger!

 

[BoostedSUV]

Re: relocating Ign module?

Ok so I've had this issue with 2 different Ty's, 3 different engine harness', 3 different ign modules, 2 different ECM's, 2 different magnetic pickups, with and without MSD 6A etc. Only thing I didn't compare was stock dizzy vs MSD since they are a bitch to change. What would cause the egine to see 6350 rpms while cranking hot and flood the engine? Low battery voltages?

 

[QWERTYphoon]

Re: relocating Ign module?

I have had similar issues over the years with my truck. One thing I noticed is that I had to much fuel pressure. (i turned mine down) While this helped, I now believe that when I start my truck the starter draws all the power away from the ignition. So to check this I hooked up a in-line spark tester to #1 and sure enough a very weak signal. But, when starter is not being cranked, and engine is running I have perfect spark. That's where I am at. I ran out of time and might work again on it next week. Interested to see what you guys have to say.

 

[CarlzBowTy]

Re: relocating Ign module?

Hi guys. I have had this issue on my
typhoon since I bought it. A fellow member and I noticed
that my datamata file shows low voltage to the computer during
The hot soak restart condition. Low being around 8 to 9 volts.
two questions: 1. Minimum voltage computer needs to operate properly?
2. Anyone using a remote relay harness to hardwire computer to bypass factory harness
For A and B computer feeds.9

 

[BoostedSUV]

Re: relocating Ign module?

I have had similar issues over the years with my truck. One thing I noticed is that I had to much fuel pressure. (i turned mine down) While this helped, I now believe that when I start my truck the starter draws all the power away from the ignition. So to check this I hooked up a in-line spark tester to #1 and sure enough a very weak signal. But, when starter is not being cranked, and engine is running I have perfect spark. That's where I am at. I ran out of time and might work again on it next week. Interested to see what you guys have to say.

Very interesting observation. My DM screen shot shows 10.7 volts to the ECM while cranking. They may be too low to fire the igniton adequately. One time when I had this issue in a parking lot I had to get jump started. As soon as I had the jumpers hooked it fired right up. Maybe the added voltage helped??

Hi guys. I have had this issue on my
typhoon since I bought it. A fellow member and I noticed
that my datamata file shows low voltage to the computer during
The hot soak restart condition. Low being around 8 to 9 volts.
two questions: 1. Minimum voltage computer needs to operate properly?
2. Anyone using a remote relay harness to hardwire computer to bypass factory harness
For A and B computer feeds.9

I have my ECM's power feed wired with a 10Ga feed off the alternator with a relay. Works great for maintaining voltage at WOT but it wouldnt help during cranking situations. One other observation is my battery seems to be weak and die out pretty quick during cranking. Its a new battery but it kind of seems like its not all there. According my digital battery charger it will only take about a 60% charge but does have 12.1 volts.

 

[MikeRenz]

Re: relocating Ign module?

According my digital battery charger it will only take about a 60% charge but does have 12.1 volts.

have you disconnected the battery from the truck while charging it?