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Topic: Problem with TC (Read 1275 times) previous topic - next topic

Problem with TC

I have been getting a strange boost issue lately, from cold start up it seems fine under full throttle but once it is at operating temperature and you put your foot into it at about
15-17psi it has a rapid backfire/stumbling noise and the power is greatly decreased. Boost leak? that is my first guess anyways, but if it is why doesn't it stumble at 10-14psi?
 
I replaced the stock FPR with an aftermarket adjustable one set at 35-36ish for now (which is stock to my knowledge) which seemed to help a bit. this
 fall/winter the engines coming out and it will be getting a full go threw, all seals replaced and while it's out I am thinking about putting in a range roller
 set-up, 3" DP And ill port and polish the Exhaust Manifold as well as the upper and lower intake and use a whole lot of engine degreaser to clean it all up.

Anyways if anyone has any ideas or suggestions or has dealt with a problem like this before i would like to hear from you, cause this is g me off.
:birdsmily:

2.5" Cat Back Exhaust, CenterForce Stage 2 Dual Friction Clutch, B&M Ripper Shifter, T3/T4 Turbonetics 63 A/R Turbo, Rods Stainless Tubular Ceramic Coated Header, Boost Controller @ 15Psi, Kirban AFPR, 42lb Injectors, 190LPH Walbro Fuel pump, Ranger Roller Cam, 3" Aluminum Intake Tubing, K&N Cone,  KYB Struts, Koni Red Horizontals/Verticals, Eibach Sportline Springs, Racer Walsh C/C Plates, Polyurethane Bushings, 17x9 Cobra R Wheels

Problem with TC

Reply #1 –
I bet you're blowing out the spark on your plugs. I had the same issue at one point.

Check your gap.

Garrett H.
'94 F250 XLT- 4x4, 5 speed, 7.3 IDI Turbo Diesel, 4" intake, 4" exhaust, 5" turnout stacks, manual hubs, etc.
'87 Thunderbird Turbo Coupe
Engine, wheels, tires, etc!
Exhaust sound clip
Another clip

Problem with TC

Reply #2 –
I had a similar effect when my intake tubing between the VAM and the turbo was sucking shut.

Problem with TC

Reply #3 –
check vam hose

check plug gap

set your fuel pressure to 40 with the vac referance off.

Go on a drive with the fuel pressure gauge conneceted aznd verify F/P rises 1:1 with boost.
[SIGPIC][/SIGPIC]
1974 maverick lsx powered turbo car SOLD
1973 maverick Tijuana Taxi Tribute
1957 chevy LSX Turbo project (race car)
Owner of Joe Dirt Fabrication

Problem with TC

Reply #4 –
Quote from: SLEEPER T-BIRD 87;175968
check vam hose

check plug gap

set your fuel pressure to 40 with the vac referance off.

Go on a drive with the fuel pressure gauge conneceted aznd verify F/P rises 1:1 with boost.

yep.
91 ranger 2.3 turbo - nowhere near stock
87 thunderbird turbocoupe
06 pontiac g6 gt
:birdsmily:

Problem with TC

Reply #5 –
Quote from: SLEEPER T-BIRD 87;175968
check vam hose

check plug gap

set your fuel pressure to 40 with the vac referance off.

Go on a drive with the fuel pressure gauge conneceted aznd verify F/P rises 1:1 with boost.


Thanks for the help guys especially sleeper. I have a video of what it sounds like under power from the outside after i pull away from doing a burnout, you can here it in second gear then i let off fast, its a strange sound but sounds like I might need to bump my fuel pressure up and check my spark plug gap.
heres video.

http://www.youtube.com/watch?v=q0QT7Pyme6g
:birdsmily:

2.5" Cat Back Exhaust, CenterForce Stage 2 Dual Friction Clutch, B&M Ripper Shifter, T3/T4 Turbonetics 63 A/R Turbo, Rods Stainless Tubular Ceramic Coated Header, Boost Controller @ 15Psi, Kirban AFPR, 42lb Injectors, 190LPH Walbro Fuel pump, Ranger Roller Cam, 3" Aluminum Intake Tubing, K&N Cone,  KYB Struts, Koni Red Horizontals/Verticals, Eibach Sportline Springs, Racer Walsh C/C Plates, Polyurethane Bushings, 17x9 Cobra R Wheels

Problem with TC

Reply #6 –
Yea, thats def not the vam hose... I'd check those gaps..
 

Problem with TC

Reply #7 –
sounds lean
[SIGPIC][/SIGPIC]
1974 maverick lsx powered turbo car SOLD
1973 maverick Tijuana Taxi Tribute
1957 chevy LSX Turbo project (race car)
Owner of Joe Dirt Fabrication