Engine almost cuts out

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wantingasy

Active member
This is the second time this has happened to me. I'll be driving on the freeway going about 70mph, then when I almost floor it and kick it down to the next gear the truck will go fast and normal but then all of the sudden it will like cut out then go back to normal. Immediately I let off the gas and might check engine light comes on for about 30 seconds, then turns off. After that it seems to be driving normal. So I kick it down again and it's fine!!! The last time it did it was like last week. Anyone know why it's doing this? My assumptions are to change cap/rotor, plugs and wires. Also to clean my K&N filter
 
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wantingasy

Active member
Re: Engine almost cuts out

I wasn't looking right at it when it happened, but when it kicks down it's at about 10 or 11 psi (and climbing) if I had to guess when it cuts out. Then it goes back to normal.
 
cloneman315

cloneman315

Active member
Re: Engine almost cuts out

im guessing that pit bull chip is making it overboost i had that happend to me long time ago,get rid of that chip if it is overboosting over your gonna blow it up if u keep doing that ,and from what your telling me it is
 
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wantingasy

Active member
Re: Engine almost cuts out

I don't think it's an overboosting problem. I've been on a long straight road and floored it and it stops at 15psi and ran fine. I don't even know if I have that pitbull chip in it right now. I think it's the stock chip. I ran diacom today for the first time ever and I don't really know how to work it, but I did go to the trouble codes and it shows a code 35 (Idle air control error)
 
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wantingasy

Active member
Re: Engine almost cuts out

You think it could just be the air filter? It seems kind of dirty to me. I just went and bought a K&N recharge kit, so I'm going to clean it on a sunny day (which is never in nor cal.) so it can dry outside.
 
gjp

gjp

another post whore
Re: Engine almost cuts out

Yeah I just washed my truck and now it rains. My garage has my gym in it. In the summer I will clear it out for my truck.
 
D

denny

Active member
Re: Engine almost cuts out

Whats your rpm when it kick down to 3rd?
If its not overboost maybe its the rev limiter.
But it shouldn't in 3rd at 70pmh if you tc is locked.
 
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wantingasy

Active member
Re: Engine almost cuts out

It's not the stock gauge. It's a autometer sport comp gauge. GJP are you located in nor cal also? I'm going to pick my girl up from work at 7:30. I'll get at like 60mph and almost floor it and see what it does, while watching the boost gauge closely. If it was an overboosting problem would it show the trouble code say if I just drive around the block and not have that problem occur?
 
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wantingasy

Active member
Re: Engine almost cuts out

I thought it could be the rev limiter too, but I've gone muchhh faster before. Maybe my TC is going bad? The tranny was rebuilt about 4-5K miles ago though, so I don't think it's that.
 
gjp

gjp

another post whore
Re: Engine almost cuts out

I live in San Jose.(if you call that nor cal) Mine was overboosting and doing the same thing. I had to turn my boost controler all the way down with the pit bull chip. Stock chip I need to turn it up.
 
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wantingasy

Active member
Re: Engine almost cuts out

I'm stumped. I could try putting in my other chip, but I'm not even sure what it is. It came with the typhoon when I bought it. Says "Alden 3bar stock inj" on it. So maybe it will be OK. Then I'll go through the process of putting my first chip in...lol
 
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wantingasy

Active member
Re: Engine almost cuts out

Just got back from picking up my girl and when I first started the TY it was running like I still had diacom running! Revving up at like 1300 rpm. I was driving down the road in 2nd gear without touching the gas pedal! Any ideas why that happened? Then when I was on my way home, it ran like normal. I kicked it down a couple of times but backed off so it didn't go above 10psi. Didn't want to push after it was running like that.
 
Don W.

Don W.

Stab it and steer it
Re: Engine almost cuts out

:2cents: Vac leak? Do you still have the original vac hoses? Stuck throttle giving high idle? Sticky wastegate causing intermittent over-boost with over-boost cut? Believe it or not check the dist. I found mine loose. Also fueling issues. Do you have a FP gauge? AFPR? check the volt meter when this happens.

Just thinking out loud...

 
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wantingasy

Active member
Re: Engine almost cuts out

Hmmm....It could be a vacuum leak. That would be the only logical thing right now. It started doing this high rev thing after running diacom earlier. It's running normal now though. The fuel on diacom was at 14.7. I do have a AFPR, but that all seems normal. Most likely a vacuum leak. Will check out tomorrow. Thanks
 
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wantingasy

Active member
Re: Engine almost cuts out

A little update. I checked for any vacuum leaks and couldn't find any. So when I was leaving work on my way back home I had a nice open run to myself. So I get on the gas hard (maybe floored, or really close...not sure) and I watched my boost gauge and sure enough, it comes up on 15psi pretty quick and it seemed like it was going to go over, which would cause the overboost problem so I let off before it did it. Thanks everyone for the information :tup: Now, some information on how to fix it would be greatly appreciated. I know it has to deal with the wastegate, but I just got this almost a month ago and don't know how to work on anything like that. :D
 
gjp

gjp

another post whore
Re: Engine almost cuts out

boost solenoid or wastegate needs adjusting.
I

took this from somewhere. " If you’re wastegate rod is out of
factory spec, your boost levels will vary. This
can be changed by lengthening the rod (lowering boost) or shortening the rod (raising
boost). You will raise or lower boost approximately 1 psi per turn of the rod"

I am new at this too. Even with my boost controler set at min, I sometimes get over 15psi.
have not tried the wastegate rod yet.
 
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