Forum: C4 ZR-1 Technical Postings
08-17-2022
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Replies: 31
Views: 27,495
Re: Long cranking
Hello,
In general, ZR-1s take a few seconds to start. My 93 starts instantly, not even giving the oil pressure time to build up (cold or hot engine). Where do you think this symptom comes from ?...
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Forum: C4 ZR-1 Technical Postings
03-02-2021
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Replies: 12
Views: 3,310
Re: Problem with PCV system ?
thank you all for your recommendations !
I just checked to see if air is escaping from the filler cap, and good news, it is not blowing air. on the contrary, I feel a slight depression when I put...
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Forum: C4 ZR-1 Technical Postings
03-02-2021
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Replies: 12
Views: 3,310
Re: Problem with PCV system ?
I will look at the tightening torque, when changing it 3 months ago the IH screws were tight.
the engine has 80k miles.
Do you find it normal to have accumulated so much oil in the PCV system...
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Forum: C4 ZR-1 Technical Postings
03-01-2021
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Replies: 12
Views: 3,310
Re: Problem with PCV system ?
Yes, you understood well. the gaskets between the IH and the cylinder head were changed 3 months ago, sorry my english is not very good.
mine smokes lightly when starting (5 seconds) then under...
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Forum: C4 ZR-1 Technical Postings
03-01-2021
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Replies: 12
Views: 3,310
Re: Problem with PCV system ?
I changed my injectors housing gaskets, would it surprise me if both were already bad? it should smoke more on one side than the other as there is little chance that both are bad. I still have the...
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Forum: C4 ZR-1 Technical Postings
03-01-2021
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Replies: 12
Views: 3,310
Problem with PCV system ?
Hello everyone !
My 1991 ZR-1 with a 1990 engine tends to smoke oil. I know the 1990's don't have an exhaust seal so they tend to smoke when starting up, I also know that oil can build up in the...
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Forum: C4 ZR-1 Technical Postings
12-15-2020
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Replies: 3
Views: 3,113
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Forum: C4 ZR-1 Technical Postings
11-29-2020
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Replies: 43
Views: 9,879
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Forum: C4 ZR-1 Technical Postings
11-29-2020
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Replies: 43
Views: 9,879
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Forum: C4 ZR-1 Technical Postings
11-29-2020
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Replies: 43
Views: 9,879
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Forum: C4 ZR-1 Technical Postings
11-29-2020
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Replies: 43
Views: 9,879
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Forum: C4 ZR-1 General Postings
11-19-2020
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Replies: 16
Views: 2,525
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Forum: C4 ZR-1 General Postings
11-18-2020
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Replies: 16
Views: 2,525
What was the price of a ZR-1 in 1990 ?
Hello everybody !
Do you know the price of a ZR-1 in 1990 when it left the factory and the price of the various options available? I'm curious to know!
Thank you in advance for your answers ...
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Forum: C4 ZR-1 Technical Postings
10-25-2020
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Replies: 8
Views: 1,805
Re: ball joint issue
okay, i have nothing to lose by trying.
I would put a message to give my feelings!:cheers:
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Forum: C4 ZR-1 Technical Postings
10-24-2020
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Replies: 8
Views: 1,805
Re: ball joint issue and stabilizing bar bushing
I am in the process of replacing the front stabilizer bar bushing. The new ones are slightly narrower than the old ones (see photo). According to you and what is the problem? I have the impression...
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Forum: C4 ZR-1 Technical Postings
10-24-2020
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Replies: 8
Views: 1,805
Re: ball joint issue
Exactly Paul, I also had the same joke for an intake gasket kit, I got those for an L98 ....=D>
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Forum: C4 ZR-1 Technical Postings
10-22-2020
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Replies: 8
Views: 1,805
Re: ball joint issue
Okay, thank you for your answers. I still find it weird that AC-DELCO, which is GM's "official" brand, sells ball joints that don't fit. I guess I'm not the only one who ordered AC-Delco.
The ball...
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Forum: C4 ZR-1 Technical Postings
10-21-2020
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Replies: 8
Views: 1,805
ball joint issue and stabilizing bar bushing
Hello everyone!
I am in the process of restoring my front suspension. I just received my new suspension ball joints (upper) their diameter is smaller than the original one which fitted perfectly...
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Forum: C4 ZR-1 Technical Postings
10-09-2020
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Replies: 31
Views: 9,037
Re: Secondary fuel pump and chip problem
Good morning all.
I come to give some news. I changed the injectors, cleaned the fuel tank, changed the filter, changed all the gaskets in the intake. During disassembly, I came across a ground...
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Forum: C4 ZR-1 Technical Postings
09-23-2020
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Replies: 1
Views: 994
coolant : confirmation ?
Hello everyone,
I'm going to drain my cooling system to change my injector housing gaskets. I have a few cans of Volvo Green coolant at home. how can you be sure that this liquid doesn?t have...
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Forum: C4 ZR-1 Technical Postings
09-07-2020
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Replies: 31
Views: 9,037
Re: Secondary fuel pump and chip problem
I am coming back to you, to tell you the latest news.
I spoke with Marc, he advised me before ordering a chip to look at the fuel pressure and test my injectors. The fuel pressure seems okay at...
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Forum: C4 ZR-1 Technical Postings
08-22-2020
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Replies: 31
Views: 9,037
Re: Secondary fuel pump and chip problem
ok...i will check at connection / ground....
because logically if the chip is the original one, I would have code 61 for the secondary butterflies ... but I don't have it
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Forum: C4 ZR-1 Technical Postings
08-22-2020
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Replies: 31
Views: 9,037
Re: Secondary fuel pump and chip problem
Hello again,
I have just returned from a road test in order to fully describe my impressions So when I am in normal mode the car drives very well, no worries from 800 to 6000 rpm.
on the other...
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Forum: C4 ZR-1 Technical Postings
08-21-2020
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Replies: 31
Views: 9,037
Re: Secondary fuel pump and chip problem
yes, the injectors, coils and spark plug wires look new which is a good thing.
About the year of the engine: yes, I think they just kept the original engine plate. I will send you a picture of...
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Forum: C4 ZR-1 Technical Postings
08-21-2020
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Replies: 31
Views: 9,037
Re: Secondary fuel pump and chip problem
hello everyone, i decided to take a look below the plenum and this is what I found. it can be seen that the secondary throttle has been removed, as well as the secondary vacuum reservoir. you can...
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