Went single and car won't boost past 0 psi
#1
Senior Member
Thread Starter
Join Date: Mar 2001
Location: Lancaster, PA
Posts: 428
Likes: 0
Received 0 Likes
on
0 Posts
Went single and car won't boost past 0 psi
Looking for some help on my install. I put a 62-1 with a .68 hot side on my FD and car starts and runs fine until I put enough of a load to get close to 0 psi. Then it starts back firing and stuttering and it won't boost past 0 psi. Anyone have any thoughts on this? I removed the rats nest and all the solenoids and the car is a 93 R1. Thanks in advance. I did a search but haven't found anything yet.
#6
Senior Member
Thread Starter
Join Date: Mar 2001
Location: Lancaster, PA
Posts: 428
Likes: 0
Received 0 Likes
on
0 Posts
I forgot to mention it is a Pettit Racing ECU. I got the small hot side for very quick spool but I doubt this has anything to do with my issue. I just wanted it for street use, nothing crazy for the track. I was told by a friend that some of the solenoids with the colored connectors need to stay attached. Is this true? I have no check engine and was considering trying the stock ECU. ?? All clamps are tight, I have the map sensor, fuel pressure regulator and the actuator near the throttle body all connected with vacuum hoses to the intake manifold. Sounds like the BOV is leaking when I am near 0 psi on my boost gauge.
Thanks guys
Thanks guys
Trending Topics
#9
Senior Member
Thread Starter
Join Date: Mar 2001
Location: Lancaster, PA
Posts: 428
Likes: 0
Received 0 Likes
on
0 Posts
I have no clue how to check the map. The car is pulling normal vacuum at idle, so I don't think I have any leaks. It has the problem as it approachs 0 psi, atmospheric pressure. Seems like a big boost leak but I don't think it is.
#10
94 Single Turbo FD
Join Date: May 2006
Location: Calgary, Alberta, Canada
Posts: 1,418
Likes: 0
Received 0 Likes
on
0 Posts
can u hear any air escaping while trying to boost?
do u have a vacuum hose hooked up to your BOV?
take of the intake and ensure the compressor wheel spins freely.
do u have a vacuum hose hooked up to your BOV?
take of the intake and ensure the compressor wheel spins freely.
#12
Senior Member
Thread Starter
Join Date: Mar 2001
Location: Lancaster, PA
Posts: 428
Likes: 0
Received 0 Likes
on
0 Posts
I have the vacuum hose attached and can't here air escaping, Compressor is free, spins good at idle.
A friend mentioned limp mode and told me to just clip all the solenoids back on to their connectors. I think that is next on the list to try out. Does anyone know if vacuum is still required on the solenoids? Or I have access to resistors if that is easy to try out.
A friend mentioned limp mode and told me to just clip all the solenoids back on to their connectors. I think that is next on the list to try out. Does anyone know if vacuum is still required on the solenoids? Or I have access to resistors if that is easy to try out.
#13
Likes to swear....alot
iTrader: (3)
Join Date: Dec 2002
Location: Kitchener Ontario Canada
Posts: 3,791
Likes: 0
Received 3 Likes
on
3 Posts
If its running fine and your just not getting boost, it'll be a leak somewhere. Either check all your couplers for the I/C piping or check EVERYTHING on your intake manifold.
Trust me, I've been there. I thought everything was hooked up properly and I was getting no boost.....turns out 1 clamp wasn't tightened at the I/C and it was leaking out like crazy once you'd step on it. It looked hooked up, but it wasn't.
Silly mistake.
Trust me, I've been there. I thought everything was hooked up properly and I was getting no boost.....turns out 1 clamp wasn't tightened at the I/C and it was leaking out like crazy once you'd step on it. It looked hooked up, but it wasn't.
Silly mistake.
#14
Eh
iTrader: (56)
No it is in limp mode I cant believe you are running a single turbo on that ecu It can be done but you shouldnt be boosting with that ecu anyways. You didnt install resistors in the wiring harness and since the Pettit Ecu is just a soldered/rechipped stock computer the car is in limp mode.
Save yourself the $2k+ you are about to spend on a motor rebuild if you try to boost on that ecu and buy yourself a Power FC and commander and pay to have the car tuned.
In case you didnt understand your car is in Limp Mode. You need 330 ohm 1/2 watt resistors in the 7 different colored connectors underneath your upper intake manifold that are all in a line together attached to the wiring harness and it will stop going into limp mode. However, if you boost more than 5-7 psi the car will likely go into permanent "limp mode"= blown engine.
Save yourself the $2k+ you are about to spend on a motor rebuild if you try to boost on that ecu and buy yourself a Power FC and commander and pay to have the car tuned.
In case you didnt understand your car is in Limp Mode. You need 330 ohm 1/2 watt resistors in the 7 different colored connectors underneath your upper intake manifold that are all in a line together attached to the wiring harness and it will stop going into limp mode. However, if you boost more than 5-7 psi the car will likely go into permanent "limp mode"= blown engine.
#16
Senior Member
Thread Starter
Join Date: Mar 2001
Location: Lancaster, PA
Posts: 428
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for all the info. guys. I ran 14 psi on this ECU on the stock twins so I was hoping 10 psi with this turbo would be ok. I can see about getting a softer spring in the wastegate if you guys think that would be best. I really can not afford anymore money right now.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM