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1G my 91 talon starts cutting out when i get into boost

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Either a log or more information is needed to give a good answer. There's lots of different problems it could be so any symptoms helps cut that list down. Is the boost building really slowly? Is it getting to wastegate pressure? Is it getting to the psi your boost controller is set to? If not, where is it peaking at? Are you getting fuel cut? The more information you can give the better.

Start by doing a boost leak test. That can rule out or confirm some of the more probable possibilities. Make sure all of the vacuum lines are connected properly and are free of damage or kinking.
 
im pretty new at this i got one boost leek left to fix were the throttle meets the intake.it still built boost just fine with the previous turbo. its building boost quick but if i go wot it feels like one of the boots came of one of the inter cooler pipes it just looses boost i have my true boost of so running of of whatever my wastegate is set at. i was told to turn my fuel pressure up but not to sure.the stock gauge goes to 14 then it starts cutting out not completely sure what the true boost read the stock gauge got my attention when it went up real quick.the air fuel was flashing 10 when i got into boost.not sure if the turbo being ported and my 02 housing isnt
 
I agree with dsmkauai, you should get the boost leaks all sorted out first.
also make sure your injectors are clean and the seals are good, you might also want to clean your maf with specialty cleaner.

also you should clean out the intercooler especially if the old turbo was leaking oil into the intake piping. [tip: gasoline cleans it out pretty good.]
 
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I agree with dsmkauai, you should get the boost leaks all sorted out first.
also make sure your injectors are clean and the seals are good, you might also want to clean your maf with specialty cleaner.

also you should clean out the intercooler especially if the old turbo was leaking oil into the intake piping. [tip: gasoline cleans it out pretty good.]
No. Do not clean the maf. Dsm do not use a hot wire maf. Karmann vortex maf are SPECIFICALLY mentioned on maf cleaning chemicals. Do not use.
 
Do not pay attention to the stock boost gauge. Use an aftermarket boost gauge to accurately see where boost levels are, then do a BLT. Wiseman knows a lot, definitely correct on not cleaning the stock maf it's a no no.

We need more information though. All you did was swap turbos? Are you still on stock injectors? Fuel cut possibly because your losing metered air by the TB leak.
 
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im going to do a leek test and repair the one i know of when i get off work.only thing I have done to the car since I have had it is replaced the turbo repaired a couple wires.i bought it with the what looks like a lot done to it.i was told the engine is stock looks like different fuel injectors not sure if the fuel pump is upgraded it has a fuel pressure regulator lightweight flywheel after market intercooler im sure there might be a couple things im forgetting
 
im going to do a leek test and repair the one i know of when i get off work.only thing I have done to the car since I have had it is replaced the turbo repaired a couple wires.i bought it with the what looks like a lot done to it.i was told the engine is stock looks like different fuel injectors not sure if the fuel pump is upgraded it has a fuel pressure regulator lightweight flywheel after market intercooler im sure there might be a couple things im forgetting

That's a lot of "not sure". I suggest you find out the injectors and fuel pump size.
 
No. Do not clean the maf. Dsm do not use a hot wire maf. Karmann vortex maf are SPECIFICALLY mentioned on maf cleaning chemicals. Do not use.

I think the op has a 2g or evo maf kinda hard to tell which, the profile picture is kinda small.

I know a lot of people say not to use it and I agree, but I have not had any issues using it, and the key is "don't drench the maf in the stuff", I only use it to clean the honeycombs on my 2g maf and I used a q tip on any stubborn areas but it usually works as is.
 
well I got stock injectors looks like the fuel pump was rewired but I believe its going to be stock.can I get it to run with low boost till I upgrade fuel pump and injectors?
 
I have stock injector and stock fuel pump, I can run 13-14lbs without any issues. You should be able to as well.

When you hit full boost what does your boost gauge say? I would set it between 12-14lbs until you have supporting mods.
 
I have stock injector and stock fuel pump, I can run 13-14lbs without any issues. You should be able to as well.

When you hit full boost what does your boost gauge say? I would set it between 12-14lbs until you have supporting mods.

it wont get to full boost it cuts out I will take it out and see what the true boost says when it cuts out when I get off work. im just running off my wastegate at the moment not sure what its set at would it be more than 14lbs
 
Im gonna jump in here and put in my opinion. I recently upped turbo intake.... all the goodies. Turned up the boost and the fuel pressure. Took the car for a ride and it ran like ass cutting out not pulling very hard was just stupid. A/f gauge read same as you are getting. I turned the fuel pressure back down and bam issue fixed... just my thought and how i fixed similar issue
 
took it for a quick spin it starts cutting out around 5 lbs afr is 14

Wow, 14 AFR is leaning out quite a bit unless that's just "cruising". Is that 14 AFR when your WOT?

Have you noticed your manifold or turbo glowing? Any ticking?

What's your fuel pressure at?

Also, is that correct in your profile that you have ECMlink? If so, people might be able to help more with a log....
 
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took it for a quick spin it starts cutting out around 5 lbs afr is 14

i set theb
Wow, 14 AFR is leaning out quite a bit unless that's just "cruising". Is that 14 AFR when your WOT?

Have you noticed your manifold or turbo glowing? Any ticking?

What's your fuel pressure at?

Also, is that correct in your profile that you have ECMlink? If so, people might be able to help more with a log....

there is a tick when i shut it down fuel pressure is around 37 i dont notice anything getting to hot i dont run it long enough when its not running right the 14 i was almost at wot a little bit of peddle left it started cutting out not as bad as before i took it out i turned the boost down as far as i could go i noticed when i first installed the turbo it got pretty hot i think the car runs a little warm it has no heat shield it does have ecmlink but that is new to me not sure how to use it
 
Do you have exhaust leaks starting at the head?

I just had a horrible time with mine. I would get full boost 9lbs and no power, sputter. Even when driving normal one night I was in 5th and just 1 mile from my house and no boostjbg or anything, got home and popped the hood and noticed the manifold/turbo glowing red.

I had many exhaust leaks, from exhaust manifold, manifold to turbo gasket, the band clamp that holds the turbo together was loose. I had o2 gasket leak and downpipe all caused this "ticking" that wouldn't go away...well it was actually because of multiple exhaust leaks BEFORE o2 sensor (must have been incorrect detonation) no crazy loudness like the usual exhaust leak but it hindered performance drastically.

I would check all your exhaust parts to ensure you aren't leaking.
 
car is running great for the most part now was just a boost leek previous owner put a gasket in backwards were the throttle meets the intake. now i can start it drive it anywhere but when i shut it of when its all warmed up and start it again it still drives but really rough
 
I also Cleaned my 2g maf and my evo maf on my evo with maf cleaner spray. On dsm no problems for 2 years. On evo no problems for like 7 years. I geuss you need to watch how much you spraying inside. Or maybe I just got lucky.
 
I agree with dsmkauai, you should get the boost leaks all sorted out first.
also make sure your injectors are clean and the seals are good, you might also want to clean your maf with specialty cleaner.

also you should clean out the intercooler especially if the old turbo was leaking oil into the intake piping. [tip: gasoline cleans it out pretty good.]
Do not clean the maf with maf cleaner. It says right on the can not to do so. Karmann Vortex maf (dsm) do not require a maf cleaner. They work with a hotwire (which does require cleaning).
 
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