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Patent 1988 IROC with a pre 85 TPI motor trouble with vacuum lines being mounted in wrong places which is causing extreme vacuum build up in crankcase

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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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

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SOURCE: NEED A DIAGRAM FOR CARB VACUUM LINES

most of the time it is on the hood in the inside but you can try and get a haynes manual for your car and it usually has one in there

Posted on May 21, 2009

  • 5520 Answers

SOURCE: I need a vacuum line diagram for a 300 straight 6

Check your PVC valve. It is suppose to vent the blowby. But if your rings are failing, then you will get a lot of blowby.

Posted on Jul 25, 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

  • 583 Answers

SOURCE: Toyota Surf 1995 3ltre diesel Vacuum diagram

dont see what you mean --- vacuum line is nothing to do with the head .vacuum pump[ is on the back of your alternator the line runs to small vacuum tank and on to the brake booster .loss of power cant be related to vacuum,

Posted on Oct 16, 2009

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1 Answer

What causes excessive crankcase vaccum, besides pcv. Pcv confirmed OK and functioning, all vacuum lines routed correctly 07 f150 5.4 3 valve


I can only think there is a fault somewhere in the pcv system that has somehow been overlooked.

The vacuum part of the pvc system provides the motive power for the flow of clean fresh air through the crankcase and into the inlet manifold via two routes, taking with it the various crankcase emissions to be burned up during the combustion process.

At idle and low revs and other times when manifold depression is high, such as during overrun, crankcase emissions tend to be drawn through the pcv valve directly into the manifold and at other times, when engine speed and load increases the venting increasingly takes place through a second vent into the air cleaner or intake. At low speed, etc. the second vent becomes the supply of clean fresh air for the crankcase.

In the early days of the pcv system some engines had fresh air supplied via a filter fitted to the crankcase and others used a vented oil filler cap. A few engines had no air inlet at all and the manifold was simply connected directly through a length of half-inch hose to the valve cover. Those engines almost never leaked oil...
For a few years BMC used a complicated vacuum regulator valve mounted on the crankcase and again a large bore hose to the manifold.

Since those days most manufacturers have settled on one of two systems using either a pcv valve or a small air bleed into the manifold to provide the motive power for the ventilation of the crankcase. Mostly there is a flame or spark arrestor/oil mist trap in the breather that sometimes becomes blocked and causes trouble, though the trouble is usually the opposite of too much vacuum.

I suggest you go back to the drawing board and recheck everything. During a service I usually test the breather by putting the compressed air blow-gun down the dipstick tube and sealing it with a cloth. If the crankcase breather is clear and working properly no pressure will build up inside the engine.
Obviously some caution is needed to avoid blowing out seals and gaskets if the breather is found to be inadequate.

Aug 08, 2015 | Cars & Trucks

1 Answer

MY 1987 S10 2.8LT. V6 IDLES EXTREMELY HIGH AL OF THE TIME, HOW CAN I CORRECT THIS?


you will have to check for any vacuum leaks and check the EGR valve. if it stuck open due to dirt/carbon or just a sticky shaft it will cause a vacuum leak.

Apr 17, 2015 | 1987 Chevrolet S-10 Pickup

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

1 Answer

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

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

Vacuum hose came off from somewhere


some cars have a vacium diagram tag some where under the engine compartment but if not go to autozone.com and try to get the diagram, or try to add pictures here so i know what are you refering to

Jun 15, 2008 | 1988 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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