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I've got ideling,running issue with my 1988 iroc.350 tpi.fuel rail not keeping pressure.

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First, did you check the fuel filter to see if it was clogged (cheap fix to replace it if you haven't recently)? Second, there's a fuel pressure regulator at the back of the tpi rail (back by the distributor). This has a diaphragm and spring in it. If the diaphragm leaks, the fuel pressure will be erratic. If you're going to check the diaphragm, I'd recommend installing an adjustable fuel pressure regulator where the stock (non-adjustable) fuel pressure regulator is at. The rail also has a bleed down circuit which will drop the fuel pressure once the vehicle is shut off. Third: the in-tank fuel pump could be on the way out.

Posted on Feb 12, 2018

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Posted on Jan 02, 2017

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  • 121 Answers

SOURCE: 1988 iroc-z 350 tpi - runs poorly when hot (190-200degrees)

Does it run poor at full throttle or between quarter and half throttle? Does it hessitate? If it does the EGR valve may be worn out. I had an 87 transam with TPI and was having problems with it stumbling and hesitating when it was warmed up. If the car starts hard and you have these problems then the issue may be low fuel pressure. Hook a guage up to the fuel rail and make sure you are getting pressure. If you are only getting a few pounds of pressure it may be the fuel pump or fuel pressure regulator. Good luck and if you thought this information was helpful please rate it when you get a chance.

Thanks - Tech101

Posted on Jun 26, 2008

  • 713 Answers

SOURCE: I have a Irco 350 TPI engine that I want to swap into a

you can run this motor carburated if you want by purchasing an after market conversion intake and carburator setup. if you want to leave it fuel injected you will need to swap wiring harnes and everything, computers and sensors you will have to run manual guages for the temp sensors and oil pressure guage and alternator due to your speedo being unable to accept them.

Posted on Aug 28, 2009

  • 484 Answers

SOURCE: do you have a spark plug wiring diagram for a 1988

Okay, #1 is marked on the distributor so in clockwise order: 1-8-4-3-6-5-7-2
8 7
6 5
4 3
2 1
(Front)

Hope this helps,
matt

Posted on Oct 07, 2009

roniecon
  • 6927 Answers

SOURCE: 1985 iroc tpi 305 can the fuel pressure be

If it is fuel injected,the fuel pressure regulator is most likely the problem,if it is carbureted the mc solenoid could be the problem,or carburetor needs rebuilding.

Posted on Feb 08, 2010

  • 611 Answers

SOURCE: I have a 1988 iroc 305 tpi 5spd car runs fine till

might wanna check the fuel injectors when the start going bad they get a high resistance at engine normal temp

Posted on Jun 15, 2011

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1 Answer

I have a 1988 iroc 305 tpi 5spd car runs fine till it gets hot. I have replaced pulgs,fuel pump,fuel filter,cap,rotor,wires,3 sensors.


might wanna check the fuel injectors when the start going bad they get a high resistance at engine normal temp

Jun 15, 2011 | 1988 Chevrolet Camaro

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87 IROC WITH A ZZ4 OUT OF A 91 Z28... fitted a


Fuel pressure? Do you hear the fuel pump running? Read the codes to see if ECM is still alive. Do you have spark at the plugs? Remember all motors need 3 things to run air, fuel, and fire at the right time.

Mar 16, 2010 | 1987 Chevrolet Camaro

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1985 iroc tpi 305 can the fuel pressure be adjusted! i bought it used and it runs good but backfires and the exaust smells badly of gas has a new o2 and map sensor on it.


If it is fuel injected,the fuel pressure regulator is most likely the problem,if it is carbureted the mc solenoid could be the problem,or carburetor needs rebuilding.

Feb 08, 2010 | 1985 Chevrolet Camaro

1 Answer

Do you have a spark plug wiring diagram for a 1988 camaro iroc z 305 tpi


Okay, #1 is marked on the distributor so in clockwise order: 1-8-4-3-6-5-7-2
8 7
6 5
4 3
2 1
(Front)

Hope this helps,
matt

Oct 07, 2009 | 1988 Chevrolet Camaro

2 Answers

I have a Irco 350 TPI engine that I want to swap into a


you can run this motor carburated if you want by purchasing an after market conversion intake and carburator setup. if you want to leave it fuel injected you will need to swap wiring harnes and everything, computers and sensors you will have to run manual guages for the temp sensors and oil pressure guage and alternator due to your speedo being unable to accept them.

Aug 28, 2009 | 1988 Chevrolet Camaro

1 Answer

Iroc z needs help


have you checked the fuses?

Jul 21, 2008 | 1990 Chevrolet Camaro

1 Answer

1988 iroc-z 350 tpi - runs poorly when hot (190-200degrees)


Does it run poor at full throttle or between quarter and half throttle? Does it hessitate? If it does the EGR valve may be worn out. I had an 87 transam with TPI and was having problems with it stumbling and hesitating when it was warmed up. If the car starts hard and you have these problems then the issue may be low fuel pressure. Hook a guage up to the fuel rail and make sure you are getting pressure. If you are only getting a few pounds of pressure it may be the fuel pump or fuel pressure regulator. Good luck and if you thought this information was helpful please rate it when you get a chance.

Thanks - Tech101

Jun 08, 2008 | 1988 Chevrolet Camaro

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