Installed new stroker, won't run right, Help!!

Blaster · 06-11-2005, 12:37 AM

I just finished installing my new 331 tonight, everything went pretty good but the car now won't idle very good, requires stepping on the gas alittle to start (not like before),hunts for idle and it also dies sometimes after quick deceleration. The check engine light also just came on and won't go away. We played with the timing (it seem's to like 13 degrees, and the fuel pressure is at about 41psi (we tried 48psi but that was terrible). I also installed a new pro-M mass air meter w/matching motosport 24psi injectors. I have not installed the new fuel pump yet. The vacuum lines look to be installed properly, and I took my old chip out of the CPU which is now back to stock until I can get back to the dyno for tuning after break-in. Any idea's??? My 1991 GT started like dream before and the e-cam had a nice tone( I re-used it in the stroker). Now the car kinda sucks and is a hard starting, crappy idling, miserable mess. Help!!!

Gearhead999 · 06-11-2005, 06:36 AM

Have you check for a vacume leak?? PCV, intake gaskets, etc

I'd check that first.

~The Jester~ · 06-11-2005, 08:26 AM

The check engine light is telling you what's wrong, or at least part of it. Get it scanned, and let us know what it is. Also, the check engine light WON'T go away, until the problem is fixed, and the history codes are cleared.

Dark_5.0 · 06-11-2005, 11:34 AM

Check your TPS voltage.

Blaster · 06-12-2005, 02:11 AM

Code 31 came up, I think it had to do with the EGR, nothin too serious though. It is harder to start though, is it normal to have to give the car a little gas to start it with a larger engine??? I though the fuel injection should be able to compensate even for the 331?? Maybe I need more timing and less fuel pressure??? Current is 13 degrees and 43psi. I'm thinking some dyno tuning will really help me out because I took my old chip out for now via my tuner's recommendation.

06-11-2005, 12:37 AM	#1
Blaster Registered Member Join Date: Mar 1999 Location: Canada Posts: 66	Installed new stroker, won't run right, Help!! I just finished installing my new 331 tonight, everything went pretty good but the car now won't idle very good, requires stepping on the gas alittle to start (not like before),hunts for idle and it also dies sometimes after quick deceleration. The check engine light also just came on and won't go away. We played with the timing (it seem's to like 13 degrees, and the fuel pressure is at about 41psi (we tried 48psi but that was terrible). I also installed a new pro-M mass air meter w/matching motosport 24psi injectors. I have not installed the new fuel pump yet. The vacuum lines look to be installed properly, and I took my old chip out of the CPU which is now back to stock until I can get back to the dyno for tuning after break-in. Any idea's??? My 1991 GT started like dream before and the e-cam had a nice tone( I re-used it in the stroker). Now the car kinda sucks and is a hard starting, crappy idling, miserable mess. Help!!!

06-11-2005, 06:36 AM	#2
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Re: Installed new stroker, won't run right, Help!! Have you check for a vacume leak?? PCV, intake gaskets, etc I'd check that first. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

06-11-2005, 08:26 AM	#3
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: Installed new stroker, won't run right, Help!! The check engine light is telling you what's wrong, or at least part of it. Get it scanned, and let us know what it is. Also, the check engine light WON'T go away, until the problem is fixed, and the history codes are cleared. __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

06-11-2005, 11:34 AM	#4
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: Installed new stroker, won't run right, Help!! Check your TPS voltage. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

06-12-2005, 02:11 AM	#5
Blaster Registered Member Join Date: Mar 1999 Location: Canada Posts: 66	Re: Installed new stroker, won't run right, Help!! Code 31 came up, I think it had to do with the EGR, nothin too serious though. It is harder to start though, is it normal to have to give the car a little gas to start it with a larger engine??? I though the fuel injection should be able to compensate even for the 331?? Maybe I need more timing and less fuel pressure??? Current is 13 degrees and 43psi. I'm thinking some dyno tuning will really help me out because I took my old chip out for now via my tuner's recommendation.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Building a stroker motor	Mustang_289	Windsor Power	4	02-17-2005 12:46 PM
Blown Stroker Computer Help	RabidPony	Modular Madness	10	02-07-2004 11:56 PM
'super' stroker vs 'budget' stroker	mike5p01	Windsor Power	4	10-11-2003 10:11 PM
351w or 347 stroker? which is better?	BLACK85GT	Windsor Power	55	12-21-2002 06:52 PM
Decided to build a stroker, but where do I start?	WhiteLX	Windsor Power	5	12-16-2002 10:35 AM