Help, TPI hard to start and runs rough at idle.
#1
Help, TPI hard to start and runs rough at idle.
I have a 1987 R10 pickup with a 383 and a TPI from a 1986 Camaro on top. This setup was done by the previous owner back in 2008 in SC. To my knowledge it has run fine for him other than it has always very hard to start when cold, and almost impossible when less than 40 degrees out. Its the same for me now that i just bought it. Hard to start when cold, worse in the winter. I have done numerous things to diagnose this and to know avail. Here is what I know.
PROM Flashed @ these specs
Ninth injector-disable
Vats-disable
Speed limiter-140mph
RPM limiter-6000RPM
Fuel pressure @ 45psi
TPS @ .54
PROM Flashed @ these specs
Ninth injector-disable
Vats-disable
Speed limiter-140mph
RPM limiter-6000RPM
Fuel pressure @ 45psi
TPS @ .54
#2
Sponsor
Re: Help, TPI hard to start and runs rough at idle.
I have a 1987 R10 pickup with a 383 and a TPI from a 1986 Camaro on top. This setup was done by the previous owner back in 2008 in SC. To my knowledge it has run fine for him other than it has always very hard to start when cold, and almost impossible when less than 40 degrees out. Its the same for me now that i just bought it. Hard to start when cold, worse in the winter. I have done numerous things to diagnose this and to know avail. Here is what I know.
PROM Flashed @ these specs
Ninth injector-disable
Vats-disable
Speed limiter-140mph
RPM limiter-6000RPM
Fuel pressure @ 45psi
TPS @ .54
PROM Flashed @ these specs
Ninth injector-disable
Vats-disable
Speed limiter-140mph
RPM limiter-6000RPM
Fuel pressure @ 45psi
TPS @ .54
www.southbayfuelinjectors.com
516-442-4707
#4
Supreme Member
iTrader: (6)
Join Date: Aug 2011
Location: San Diego, California For Now
Posts: 2,379
Likes: 0
Received 10 Likes
on
10 Posts
Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: Help, TPI hard to start and runs rough at idle.
Cold start injector ?
#5
Re: Help, TPI hard to start and runs rough at idle.
TPI's are cool in trucks...
Check to make sure you have 5v at the cts connector.
If you have less, the ecm thinks it's warmer then it really is and doesn't add enough fuel to start...Thats what happened to me. Changed to my spare ecm problem went away.
Check to make sure you have 5v at the cts connector.
If you have less, the ecm thinks it's warmer then it really is and doesn't add enough fuel to start...Thats what happened to me. Changed to my spare ecm problem went away.
#6
Supreme Member
iTrader: (8)
Join Date: Oct 2001
Location: Il
Posts: 11,873
Received 898 Likes
on
589 Posts
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Help, TPI hard to start and runs rough at idle.
If you have the cold start disabled you will need the inj tables changed to whatever the 88-89 cars have for the colder coolant /air temps.
Post up in the DIY prom tuning
Post up in the DIY prom tuning
#7
Re: Help, TPI hard to start and runs rough at idle.
OK, I talked to the company TPIParts.net about this and after some time of discussing the problem they went ahead and sent me a new chip. I thought It was nice of them to help up until recieving the chip they wrote me a nasty note saying to F off and leave them alone, WOW I never askd them for anything but guidence and they sent me a chip on their own accord so after that I will never do business with them again, any ways the chip made it a lot easier to start but now I have a new problem. The motor surges up and down by about 500 rpms and if I hit the gas anything quicker than a grandma could it loads up pops and backfires and it drives me wild. So in attemp to fix one prob, I got another. So far I have done as much diagnostics as I can and not sure what is the cause.
Trending Topics
#8
Supreme Member
iTrader: (6)
Join Date: Aug 2011
Location: San Diego, California For Now
Posts: 2,379
Likes: 0
Received 10 Likes
on
10 Posts
Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: Help, TPI hard to start and runs rough at idle.
Try talk to https://www.thirdgen.org/forums/member.php?u=138103
Really good honest guy dealt with on couple occasions
I also dealt with this guy when doing couple of my tbi chips he also does tpi chips also
http://www.tpichips.com/ great guy good communication
Really good honest guy dealt with on couple occasions
I also dealt with this guy when doing couple of my tbi chips he also does tpi chips also
http://www.tpichips.com/ great guy good communication
#9
Re: Help, TPI hard to start and runs rough at idle.
I still havnt been able to figure this out. Now im getting a constant code 36 that wont go away. Ive replaced the relays and double checked the connections and to no avail.
Thread
Thread Starter
Forum
Replies
Last Post