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Megan racing 3 inch. ^^^^^^^

Could it be possible that the 3 inch intercooler and 2.5 inch piping could cause a pressure drop on our tiny stock turbo?

Haha. When I adjusted the TPS is got better but it would only get so much better before I was not ever reaching the idle switch and getting the TPS code.

New AFM with new wires. That is what is confusing about my car. I half expect that my ECU is just bad. I have rewired so much in the car to still get issues with brand new sensors.

It reaches 10psi then slowly goes down with rpm increase and if I put in fifth at 2500-3000 it will hold 10psi. If I had a boost leak wouldn't it leak out before 10psi? and the wastegate is internal and still very tight and strong.

I just rechecked my codes and I did come up with a AFM code. However it runs fine and the afm works well. I don't have any lean spots or over rich spots. I also have tested the AFM for spec resistances. Everything checks out. Maybe the afm just can't read that low or is somehow malfunctioning?

Preload arm. I am currently tight on funds. I know it is not an official way. I was just using it to make the turbo spool faster. I really hasn't affected the pressure much. I plan on getting a boost controller later.

I have an 88 turbo with just a few basic mods including a large intercooler with 2.5 piping and 3 inch exhaust. Nothing else majorly different. But at WOT It builds 10psi then as rpms increase the boost decreases until it settles at ~7psi. Could it be possible that I've already maxed the turbo...

I have driving manuals for years. I can't stand autos. This is also happens when I've been in gear and not just when shifting. However that is good advice. I will check my wires first. Then I'll get money for new injectors if not that. I probably need them anyway.

My 88 Turbo is jumping a little under light loads. Is 100% replicable with quick drive and is consistent. It happens at less than about 5-10 % throttle. Cars idles fine. Car runs fine at more than 5-10% throttle. Boosts fine and reliably at 10psi. Gets expected gas mileage. Has no codes. IAC is...

Ok for starters the knock sensors are rewired. Second it ran rich all of the time until that day. Found out it was the afm. With a different AFM it ran great. It just didn't throw a code for it. Don't know why but it didn't. I check the AFM and it wasn't to spec, so I'll save the money for the...

Nope. Never spent a dime. I was panning on saving. Congratulation. You guessed wrong. I wanted to know which route to take. Which doesn't matter because for some reason the ECU can't make up it's mind. Everything is fixed except a code that makes it run rich. Since it's running lean confusion...

Yes, same injectors, with same AFM. All stock. This just popped up the other day after no changes were made to the car. Not only that but I did have both knock sensors rewired and it was one sensor into both inputs and it didn't change anything. I'm not looking for people to tell me about the...

Ge block with gte ecu. I have to tap the block for the knock sensors wholes. So is anyone going to tell me what could have change recently to cause this? Obviously my lack of wide band isn't causing this and the knock code was making it rich. So I want to know if anyone has an opinion on what...

I don't have the money. And however it doesn't telling me extremely accurately it is correct. It is leaning out and running like crap. Plus, the knock code makes it run rich not lean and it has driven fine like that for about 3 months so I'm wondering what changed not what I already knew. The...

I have an 88 turbo and it just started running super lean the other day. I have the regular gauge, so obviously I can only say really lean instead of a certain a/f ratio. However everything on this engine is new, it holds perfect fuel pressure, the afm is new and good, and I have a knock code...

Lowered the fuel pressure by 3psi and it completely stopped. The A/F ratio is still perfect and the acceleration even smoothed out a little. Problem solved.

Boost guage is stock. The AF ratio is still rich. and it runs fine so I don't think it's fuel cut. It's not acting like fuel cut. And for the record I do have basic mods like intercooler, downpipe, full exhaust, remanufactured injectors, afpr, walbro 255, 57 trim upgrade, and many other piddly...

When I upped the boost on my 88 turbo I started hearing a solid ding very very similar to the "key in ignition, door open" alarm. It comes on when the boost gauge reads about 7 or higher and stops when I let out. Only does it when I pass 7 lbs of boost. Do the mk3's have a warning alarm?

I already have 15000 into it. I bought it with a blown headgasket and rebuilt it. (bored 40 over and upgraded CT26 with afpr). Then a turbo oil seal blew out (Shotty work from the shop) and I rebuilt the turbo and got another drop in engine to get back on the road and added a 255lph because the...